60 Series 57 Exam Concepts You Need to Know Before Test Day

SEA Section 3(a)(38) defines a market maker as a dealer who, with respect to a particular security, holds itself out to the market as being willing to buy and sell that security for its own account on a regular or continuous basis. Two elements do the work: holding out publicly, and regularity or continuity of quoting. A dealer that trades its own capital occasionally is not automatically a market maker. Rule 3b-8 then defines qualified OTC market maker, qualified third market maker, and qualified block positioner. Those qualified labels matter because they gate favorable treatment under the net capital rule, so a firm that fails one definitional element loses the reduced haircut even if it behaves like a market maker every day.

Memory hook:Held out plus regular and continuous equals market maker; the qualified tag unlocks the haircut.

An MPID is the identifier that tags every quote and trade a member sends into the market, and all activity under it belongs to the member. Rule 6480 lets a member use multiple MPIDs for quoting and trading in OTC equity securities, but each MPID must be registered and the member remains fully responsible for activity under all of them. Rule 6271 covers registration as an ADF market maker or ADF ECN — you register before you quote. Rule 6275 governs withdrawal of quotations, while Rule 6276 covers voluntary termination of registration. The sequence matters: registration enables quoting, withdrawal pulls the quotes, and termination ends the registration itself.

Memory hook:6480 many MPIDs, 6271 register, 6275 pull quotes, 6276 quit the role.

Net capital equals net worth minus haircuts on positions and other regulatory deductions, and Rule 15c3-1 sets the floors by business type. A market maker must maintain at least 100,000 dollars in net capital, while a qualified block positioner — a firm taking large positions to facilitate block business — must maintain at least 1,000,000 dollars. The mechanism is a buffer: positions carry haircuts that grow with risk, so a firm with concentrated inventory can be compliant on paper and still breach the floor after a mark against it. The decision rule is simple: identify the role first, then apply the floor, because the block positioner's million-dollar requirement is ten times the market maker's.

Memory hook:Market maker floor 100K; block positioner needs ten times more, one million.

Rule 5250 bars the buying and selling of market making itself. No member may accept, and no person may give, anything of value — cash, rebates, spreads, or other compensation — in exchange for quoting or trading activity as a market maker. The concern is that paid quotes are not bona fide: a firm paid to show a market may quote without genuine willingness to trade, misleading investors about real liquidity. The rule does contain exceptions, notably payments for services actually rendered, provided they are consistent with just and equitable principles of trade and properly disclosed. The distinction to hold onto: compensating someone for legitimate services is permitted; compensating someone to make a market is not.

Memory hook:5250: you can pay for services, never for the market making itself.

Rule 15c3-5 applies to any broker-dealer with market access, whether trading for its own account or sponsoring a customer's access to an exchange or ATS. The member must implement pre-trade risk controls and financial requirements: capital and credit thresholds checked before each order, order-level checks to prevent erroneous orders (price, size, duplicates), and controls ensuring compliance with regulatory requirements like locate rules and LULD. With sponsored access, a customer trades through the member's MPID or technology, and the member remains responsible for that customer's orders. The critical prohibition: unfiltered or naked access, where orders bypass the sponsoring member's pre-trade checks entirely, is not permitted. The member can never outsource the risk controls.

Memory hook:15c3-5: risk checks before every order, and no naked access, ever.

A stop order sits dormant until the market trades at the trigger, then converts. A plain stop becomes a market order, so execution is likely but the price is whatever the market gives you. A stop-limit becomes a limit order, so you control the worst acceptable price but risk no execution at all. Direction matters: a buy stop triggers at or above the stop price (buying into strength, protecting a short), while a sell stop triggers at or below it (limiting a loss on a long position). The classic failure mode is a gap: the stock blows through the trigger, and a stop-limit with a limit set near the trigger never fills, leaving the position unprotected.

Memory hook:Stop becomes market, stop-limit becomes limit; gaps strand the stop-limit unfilled.

A market-on-open order executes at the exchange's opening price, and a market-on-close order executes at the closing price, letting a trader guarantee participation in those benchmarks without naming a price. The catch is timing discipline. Exchanges set entry cutoffs: MOO orders must be in before the opening rotation begins, and MOC orders must be submitted by a stated time late in the session, after which cancellation is restricted or prohibited. Those cutoffs exist to stop a trader from gaming the benchmark — you cannot watch the closing imbalance and then cancel or add at will. The paired order types are limit-on-open and limit-on-close, which add a price cap to the same mechanism.

Memory hook:MOO rides the open, MOC rides the close; after the cutoff, no takebacks.

A pegged order reprices itself automatically relative to a reference point — the NBBO midpoint, the best bid, or the best offer — so it stays competitive as the market moves without anyone touching it. A reserve order, often called an iceberg, splits one large order into a small displayed piece and a large hidden reserve; as the displayed portion fills, the system replenishes it from the reserve until the whole order is done. The two solve different problems: pegging manages price, reserving manages size. Traders use icebergs to avoid tipping the market to their full interest, and pegs to avoid being outpriced. Note what each hides: a reserve order conceals quantity, while the displayed price remains real and executable.

Memory hook:Pegs chase the reference price; icebergs show the tip and hide the mass.

Time-in-force tells the market how long an order lives: day orders expire at the session's end, good-til-canceled orders persist until filled or canceled, immediate-or-cancel orders take whatever is available now and cancel the rest, and fill-or-kill orders demand the entire quantity immediately or die. Contingent and stipulation orders add conditions: all-or-none requires the full size but tolerates waiting, minimum quantity sets a floor on any partial fill, and not-held gives discretion to the executing trader on price and time. The exam move is separating the two dimensions — time versus condition. Fill-or-kill is the strictest combination: immediate and complete, while all-or-none is complete but patient.

Memory hook:FOK: now and all. AON: all, eventually. IOC: now, some is fine.

The 11890 series lets a market bust or adjust a trade that was clearly erroneous, but not every bad fill qualifies. The minimum criteria look at whether the execution price deviates from the prevailing market price by more than a percentage threshold that varies with the security's price tier, along with factors like the number of shares and whether the execution resulted from a sudden order entry error. The process moves fast: a request for review generally must be made within 30 minutes of the execution. Outcomes differ — the trade may be nullified (canceled entirely) or adjusted to a different price, and adjustment is preferred where it preserves the trade while curing the error.

Memory hook:11890: deviation beyond the tier threshold, request within 30 minutes, then bust or re-price.

The ADF is FINRA's facility for quoting and trading NMS stocks otherwise than on an exchange, giving market makers and ECNs a place to compete with exchanges for off-exchange order flow. Rules 6210 through 6273 build the operating framework: 6210 and 6220 set general provisions and definitions, 6230 governs use of ADF data systems, 6240 prohibits locking or crossing quotations in NMS stocks, 6250 sets quote and order access requirements, 6260 provides for review of access complaints, and 6273 fixes normal business hours — 8:00 a.m. to 8:00 p.m. Eastern time. An ADF market maker must register, quote two-sided, and honor its displayed quotations, which is what makes ADF quotes real liquidity rather than advertisements.

Memory hook:ADF hours run 8 to 8 Eastern; registered quotes must be honored.

An alternative trading system matches the orders of its subscribers — institutions and traders looking for an off-exchange venue — without registering as a national securities exchange. Regulation ATS requires the system's operator to be a registered broker-dealer and an SRO member. Rule 300 supplies definitions, Rule 301 the core requirements, and Rules 302 and 303 the recordkeeping and record preservation duties. The pivotal mechanism in Rule 301 is the volume trigger: once an ATS's trading in a given security exceeds 5 percent of the consolidated average daily volume, the system must display its orders to subscribers, bringing its liquidity into the light. Fair access rules also bar an ATS from unfairly blocking subscribers, so the venue cannot be a private club.

Memory hook:Five percent of volume turns on the ATS display light.

Rule 5280 prohibits a member from trading ahead of its own research reports in a manner contrary to the recommendation. Once a member knows a research report on a security is about to be published, it cannot trade for its own account against the report's recommendation during the period before publication — no selling ahead of a bullish report, no buying ahead of a bearish one. The concern is integrity: a firm trading against its own forthcoming recommendation undermines the report's credibility. Exceptions exist, notably transactions in support of bona fide market making or proprietary trading and trades to facilitate customer orders. Decision rule: identify the recommendation's direction, then ask whether the firm's own trades ran contrary before publication.

Memory hook:5280: no trading against your own report before it hits the street.

Rule 5270 protects a block order from being front-run by the firm holding it. A block is defined as at least 10,000 shares or 200,000 dollars in market value. Once a member receives a block order, it cannot trade for its own account on the same side of the market ahead of execution — no buying inventory first when a large buy is coming, no selling ahead of a large sell. The exceptions matter most: bona fide risk arbitrage, bona fide hedging, market making in the ordinary course, and trading to facilitate the block itself are all permitted. So the analysis is never just whether the firm traded first — it is whether the trade fits a recognized exception.

Memory hook:5270: 10,000 shares or 200,000 dollars; never front-run the block unless an exception fits.

Rule 10b-5 is the general antifraud prohibition — employing any device, scheme, or artifice to defraud in connection with a securities purchase or sale. Rule 10b5-1 supplies the insider trading test: a person trades on the basis of material nonpublic information when aware of it at the time of the trade. Its affirmative defense is the prearranged trading plan — adopted before the person was aware of the information, with price, amount, and dates set in advance. Rule 10b5-2 covers misappropriation: it defines when a duty of trust or confidence exists, including family relationships and professional ones like attorney or physician, so trading on a tip taken from such a relationship violates the rule even without a fiduciary tie to the issuer.

Memory hook:10b5-1: aware means on the basis; 10b5-2: family and professional duties bind tippers.

Section 9 of the Exchange Act is the manipulation code for exchange-listed securities. It prohibits wash sales — trades with no change in beneficial ownership — and matched orders entered to create a false appearance of active trading. Section 9(a)(2) is the workhorse: it bars effecting transactions that create actual or apparent active trading or raise or lower a security's price, with intent to deceive. The section also targets spreading rumors to affect price, false or misleading statements about securities, and certain short sales by members below the last different price without an uptick. The boundary to remember: Section 9 governs securities registered on national exchanges, while Rule 10b-5 reaches securities generally, including OTC.

Memory hook:Wash, match, rumor, false statement — Section 9 polices the exchange-listed.

Rules 5230 and 5290 attack two different abuses. Rule 5230 targets paid publicity: a member cannot publish, or induce publication of, information about a security's price or market in exchange for consideration unless the payment and compensation are clearly disclosed. The concern is that a seemingly independent article or newsletter is really a purchased promotion. Rule 5290 targets abusive order entry: a member cannot enter orders designed to take unfair advantage of another participant's order handling practices, nor enter orders to disrupt a fair and orderly market or move a price to benefit its own position. The pairing logic: 5230 is about money changing hands for favorable coverage; 5290 is about the order book itself being weaponized.

Memory hook:5230 pays the press, 5290 games the order book.

Rules 5210 and 5220 police the truthfulness of what a firm puts before the market. Rule 5210 prohibits publishing or circulating transactions that did not occur, or quotations that are not bona fide — no advertising fake prints to suggest liquidity or momentum. Rule 5220 prohibits offering to buy or sell a security at a stated price unless the member intends and is able to do so, and the stated price must be honored. The mechanism is credibility: every published trade and every stated offer is a representation to other participants, and the rules make those representations enforceable. The distinction to keep straight: 5210 covers transactions and quotations already published; 5220 covers forward-looking offers at a stated price.

Memory hook:5210: fake prints. 5220: fake offers. Both must be real.

When a security is halted, the market for it must actually stop. Rule 5260 prohibits members from effecting transactions, publishing quotations, or publishing indications of interest in the halted security while the halt is in effect. Rule 6120 extends halts across venues: when trading in an NMS stock is halted on the exchange where it is listed, FINRA members must halt as well, and Rule 6440 provides the analogous mechanism for OTC equity securities. Rule 6121 addresses halts due to extraordinary market volatility. The practical decision rule: a halt freezes not just executions but also quotes and IOIs, so a member who keeps advertising interest during a halt violates the framework even without printing a trade.

Memory hook:Halted means silent: no trades, no quotes, no IOIs.

Rule 6190 requires FINRA members to comply with the Regulation NMS plan addressing extraordinary market volatility — the limit up-limit down framework. The mechanism is price bands: for Tier 1 NMS stocks (S&P 500, Russell 1000, and select ETPs), the band is 5 percent of the average price during most of the regular session and 10 percent during the opening and closing periods; Tier 2 stocks get 10 percent and 20 percent bands. If a stock trades outside its band and does not return within it, trading pauses — five minutes for Tier 1 securities — giving the market time to re-form a fair price. Volatility trading pauses are the visible result: a sudden spike or plunge triggers a breather rather than a free fall.

Memory hook:Tier 1 bands 5 and 10; Tier 2 bands 10 and 20; doubled at open and close.

When a security is halted, normal trading stops, but not all activity freezes. FINRA Rule 6120 governs trading halts, and Rule 5260 bars members from publishing quotations or indications of interest during a halt. Exchanges run structured crosses—opening and closing crosses and single-price crosses after news halts—to match accumulated buy and sell interest at one clearing price. Imbalance information is disseminated so participants can lean against it with offsetting orders. The mechanism matters: a cross is an execution event, not a quotation, so it can occur during a halt while quotes and IOIs cannot. Decision rule: executions through the cross are permitted; publishing interest to the broader market during the halt is not.

Memory hook:Crosses can cross during a halt; quotes and IOIs cannot.

An IOI is a nonbinding expression of interest to buy or sell, and it is treated like a quotation for publication purposes. Under FINRA Rule 5210, a member may not advertise volume unless it actually participated in the trades in proportion to the amount advertised—no borrowing someone else's activity. Rule 5260 bars IOIs during trading halts. Reg NMS Rule 602 governs dissemination of quotations to the consolidated system, and Rule 610 requires fair, non-discriminatory access to quotations, with access fees constrained and locked or crossed markets denoted. The exam tests the boundary: IOIs and advertised volume must reflect genuine interest and real participation, and access to quotes cannot be restricted.

Memory hook:Advertise only what you traded; never IOI during a halt.

Rule 5131 attacks distribution abuses in new issues. Spinning—allocating hot IPO shares to executives or their family members to win investment banking business—is prohibited, as is deputizing research or sales staff to perform underwriting functions without registration. Members with investment banking relationships cannot sell IPO shares to accounts of associated persons, brokers, or industry insiders without approval, and market-making accounts face restrictions on receiving allocations. FINRA also requires lock-up and market-back provisions and notice of penalty bids under 5190(e). The mechanism is simple: allocation of a scarce new issue is a form of compensation, so the rules police who gets it and why. Watch for quid pro quo facts—shares steered to banking clients are the classic violation.

Memory hook:Hot shares for banking favors is spinning; unregistered helpers is deputizing.

Rule 101 keeps distribution participants from buying the security they are distributing during the restricted period, because syndicate buying could artificially support the price. For actively traded securities, the restricted period begins at the end of the last regular trading day before the first day the security is offered; for other securities, it can begin up to five business days before. Once it starts, participants cannot bid for or purchase the covered security, with exceptions such as unsolicited bona fide purchases, passive market making, stabilization, and syndicate covering trades. The decision rule: identify who is a distribution participant, then ask whether the purchase fits a stated exception. If neither fits, the purchase violates Rule 101.

Memory hook:Actively traded locks one day early; others up to five.

Rule 103 gives Nasdaq syndicate members a safe harbor to keep quoting during an offering. A syndicate member may submit passive bids for the covered security during the restricted period if the underwriter approves and the member displays continuous one-sided quotations. The core constraint: purchases must not exceed the highest independent bid in the market, and if the member's bid would be the highest, it must withdraw rather than set the price. Net purchases are also capped relative to average daily volume. The logic is that a passive market maker adds liquidity without supporting the offering price. Decision rule: quote continuously, never top the independent bid, and pull the quote when you would be the best bid.

Memory hook:Passive means never on top—match the best bid, never beat it.

Stabilization is the one manipulation that is lawful when performed by syndicate members under Rule 104. A stabilizing bid may be entered only by or for the syndicate, at only one price, and never above the offering price (or, for IPOs, not above the lower of the offering price or the highest independent bid). The bid must be displayed and cannot be raised once the market breaks below it. Penalty bids are the flip side: syndicate agreements that penalize members whose customers flip shares, letting the syndicate cover its short position. FINRA Rule 5190(e) requires notice of penalty bids in OTC equity offerings. Exam rule: stabilizing is permitted but boxed in—one price, one bid, disclosed, never above the offer.

Memory hook:One bid, one price, never above the offer—that's stabilizing.

Rule 105 bars buying with restricted stock: you cannot purchase shares in an offering from an underwriter if you sold the same security short within five business days before pricing. The rule is strict liability—motive does not matter, and the short sale need not have been intended to manipulate. The window runs from five business days before pricing through pricing, and the purchase covers any allocation from that underwriter. The main exception is the bona fide purchase, meaning the short position was closed in the open market before the offering purchase, or the purchase was otherwise independent of the short sale. Decision rule: check the timing window first, then ask whether the position was genuinely closed before the allocation.

Memory hook:Short within five days, no allocation—no intent required.

Rule 10b-18 gives issuers a safe harbor from manipulation claims for repurchasing their own stock, but only if four conditions are met. One: a single broker or dealer executes all purchases on any day. Two: timing—purchases cannot be made in the opening period or within the final 30 minutes of trading (10 minutes for less active securities). Three: price—not above the highest independent bid or last independent quotation. Four: volume—not more than 25 percent of average daily trading volume, with block purchases excluded from the cap. Falling outside any condition loses safe harbor protection, though the trades are not automatically manipulative. The exam rewards counting: one broker, right time, right price, 25 percent cap.

Memory hook:One broker, right clock, bid or below, 25 percent cap.

These two rules handle mechanics around IPOs and Reg M in the Nasdaq and OTC space. Rule 6130 requires members to report transactions in Nasdaq-listed IPO securities and bars members from publishing quotations or IOIs in an IPO security before the offering is completed. Rule 6435 addresses Reg M compliance: an OTC market maker that is a distribution participant must withdraw its quotation in the security during the restricted period unless an exception applies, such as passive market making. The relationship is the point: quotation obligations normally run continuously, but offering rules override them temporarily. Exam rule: during the restricted period, the default for a participating OTC market maker is withdrawal of the quote, not continued quoting.

Memory hook:Reg M restricted period means the OTC quote comes down.

Section 3(a)(51) defines a penny stock as an equity security priced under five dollars per share that is not otherwise excluded. The exclusions do the real work: securities listed on a national exchange or quoted on Nasdaq are excluded, as are registered investment companies, standardized options, and certain issuers with real financial substance—an issuer with net tangible assets of at least two million dollars after three years of operation, five million dollars with a shorter history, or average revenue of six million dollars over three years. So a one-dollar Nasdaq stock is not a penny stock, while a four-dollar OTC stock usually is. Decision rule: check price, then check the exclusion list before applying any penny stock regime.

Memory hook:Under five dollars, but exchange listing or Nasdaq quoting saves it.

Rule 15c2-11 is the gate to OTC quoting: a broker-dealer cannot initiate or resume quotations in an OTC equity security unless current information about the issuer is available. The vehicle is FINRA Form 211, filed through the OTC disclosure system, containing issuer financials, business description, officers, and share structure. The information must be reasonably current and publicly accessible, and the member must maintain it—generally for 30 days after initiation—before another member can piggyback on the quotation. Exceptions exist for transfers of market making status and for issuers subject to reporting requirements. The exam distinction: 15c2-11 governs quoting, not trading. You can trade a security freely; you cannot publish the first quote without the information package.

Memory hook:Form 211 opens the quote, not the trade.

The 15g series layers disclosure onto penny stock transactions. Rule 15g-1 provides exemptions, including for certain transactions with established customers and those not recommended by the broker. Rule 15g-3 requires monthly statements to customers showing market value, the bid and ask used, and the number of shares the market maker would commit to at those prices. Rule 15g-4 requires disclosure of the compensation the broker-dealer receives, including markups, made in the confirmation at or before completion of the transaction. Rule 15g-5 extends that to compensation paid to associated persons, likewise disclosed in the confirmation. The exam pattern is matching rule to disclosure: monthly market data is 15g-3, firm compensation is 15g-4, registered person compensation is 15g-5. 15g-1 is the exemption valve.

Memory hook:Three is monthly market data; four is firm pay; five is rep pay.

A blank check company is in the development stage, has no specific business plan, and either has no stated operations or plans to merge with unidentified companies. Rule 15g-8 bars broker-dealers from selling its escrowed securities unless the issuer has filed a registration statement with audited financials and the securities are subject to reporting. The FINRA rules cover quoting mechanics: 6433 sets minimum quotation size requirements for OTC equity securities, 6434 sets minimum pricing increments, 6437 bars locking or crossing quotations, and 6460 requires display of customer limit orders. The exam pairs the blank check restriction with the quoting mechanics, so know which rule does which job—escrowed shares are the sales gate, and the 6400-series rules govern how quotes are displayed.

Memory hook:Blank check: no plan, escrowed shares stay locked until registered.

Rule 200 requires every sell order to be marked long, short, or short exempt, and the mark must reflect the seller's actual position when the order is entered. A long sale requires ownership of the security, including shares the seller is deemed to own—securities deliverable from exercise of an option, conversion, or a binding contract already exercised. You cannot mark a sale long based on an intent to acquire shares later. Short exempt marks apply to sales by registered market makers, bona fide hedging, and sales otherwise exempt from price tests. The mechanism is the audit trail: the mark tells regulators whether the sale was a long liquidation or an increase in a short position. Ownership at entry dictates the mark, not expectation.

Memory hook:Mark what you own at entry, not what you plan to own.

Rule 203 is the borrow backbone of Reg SHO. Before entering a short sale, a broker-dealer must locate the stock: borrow it, have a reasonable belief it can be borrowed, or document the basis for that belief. Locates must be documented before the order, and the source matters—a locate from someone who does not own and cannot borrow the shares is worthless. Exceptions exist: bona fide market making and hedging activity are excused from the locate requirement, but not from the close-out rules. For threshold securities—those with persistent fails-to-deliver—the requirements tighten further. Decision rule: no documented locate, no short sale, unless the order genuinely falls within the market making or hedging exception. The exam tests locate timing and exception scope.

Memory hook:No locate, no short—unless you're a bona fide market maker.

Rule 201 is the price test: if a covered stock drops ten percent or more from the prior day's close, a circuit breaker triggers, and for the rest of that day and the next, short sales are permitted only at a price above the current national bid. Exceptions include registered market makers and bona fide hedging. Rule 204 is the enforcement tail: fails-to-deliver in threshold securities must be closed out within 13 consecutive settlement days after the trade date, or 35 days for failures resulting from bona fide market making or hedging. Until the position is closed out, the participant cannot short that security again. The exam pairs them: 201 restricts price, 204 forces delivery. Know which rule is triggered by which event.

Memory hook:201 is the price test; 204 is close-out in 13 or 35.

These are the reporting twins for short sales: Rule 6182 covers trades in NMS stocks reported to a trade reporting facility, and Rule 6624 covers OTC equity securities reported to the OTC Reporting Facility. Both require the trade report to carry a modifier showing whether the sale was short or short exempt, consistent with the Reg SHO marking on the order. The mechanism is transparency—regulators and the public can see short volume by security. The trap is scope: the requirement applies to all short sales, including those by market makers, and the modifier must match the order mark. A short exempt sale still gets reported, just with the exempt modifier. Decision rule: match the report modifier to the Reg SHO mark, every time.

Memory hook:NMS to 6182, OTC to 6624—report the mark you made.

These are the core multi-leg structures. A vertical spread is long one option and short another of the same type with different strikes: a bull call spread buys the lower strike and sells the higher, paying a debit; max loss is the debit, max profit is the difference between strikes minus the debit. A bear spread works in reverse for a credit. A straddle is a call and a put on the same strike and expiration, bought for movement in either direction—breakevens are strike plus and minus total premium. A combination is any other pairing, such as different strikes or expirations. The math is what the exam wants: identify debit or credit, then compute max profit, max loss, and breakeven from strike width and premium.

Memory hook:Debit pays to open and wants width; straddle breakeven brackets the strike by premium.

Index options settle in cash because you cannot deliver a basket of 500 stocks. Exercise of an in-the-money call pays the difference between the index settlement value and the strike; the seller pays cash, and no shares move. Most index options are European style, exercisable only at expiration, which eliminates early assignment risk. The settlement value may be based on closing prices or a special opening quotation on the expiration date. VIX options are the trader's volatility vehicle: the underlying is expected 30-day S&P 500 volatility, and they settle in cash against the VIX settlement value. Position limits for broad-based index options run larger than single-stock limits. Exam rule: no delivery, exercise at expiration only, cash equals index value minus strike.

Memory hook:No basket to deliver—cash equals index minus strike, exercise at expiry.

A customer exercises by tendering an exercise notice to the broker, who relays it to OCC by the exercise cut-off. OCC then allocates exercised contracts to clearing members—generally by random selection—and the member assigns them to short option holders under Cboe Rules 6.20 and 6.21, using methods such as random selection or first-in, first-out. OCC automatically exercises certain in-the-money contracts at expiration unless the holder opts out. Sellers of American-style options carry assignment risk any time before expiration, and assignment means delivering or receiving shares at the strike. The exam tests the chain: customer tenders, broker relays, OCC allocates to the clearing member, member assigns to a customer. Random selection at the OCC level is the default fact.

Memory hook:Tender to broker, OCC assigns randomly, member picks the customer.

Position limits cap the aggregate options one person or group can hold on the same side of the market, and exercise limits cap how many contracts can be exercised within a set period, usually five business days. The mechanism is same-side aggregation: long calls and short puts are both bullish and count together; long puts and short calls are both bearish and count together. Spreads and straddles can reduce or eliminate the counted position because the offsetting legs sit on opposite sides. Cboe 8.43 requires members to monitor and report positions approaching the limit. The decision rule is simple: identify the side of the market, aggregate the same-side contracts, and compare against the applicable limit.

Memory hook:Calls with puts on the same side stack; spreads and straddles offset.

Cboe Rule 5.6 governs how option orders are entered and how long they live. Market orders execute immediately at the best available price; limit orders set a worst acceptable price; stop and stop-limit orders activate only after the option trades at or through the stop price. Time-in-force instructions control lifespan: day orders expire at the end of the session, good-til-canceled orders persist until filled or canceled, immediate-or-cancel kills any unfilled portion right away, and fill-or-kill demands the whole quantity at once or nothing. The practical decision rule is matching the instruction to the trader's intent: certainty of execution versus certainty of price, and full fill versus partial fill. Misreading an IOC versus FOK distinction changes the outcome entirely.

Memory hook:IOC takes part and cancels the rest; FOK is all or nothing.

Rule 5310 obligates a firm receiving a customer order to use reasonable diligence to execute it at the most favorable price reasonably available under prevailing market conditions. That means evaluating venues, speed, and likelihood of execution, not just grabbing the first quote. Interpositioning is the related trap: inserting a third party, such as another broker-dealer, between the customer and the best available market. Interpositioning is allowed only when the customer specifically consents beforehand and the interposition does not result in a worse price or higher cost than a direct execution. The mechanism to remember is economic: any middleman layer must be costless or beneficial to the customer, or it violates the rule.

Memory hook:Best execution means best price available; interpositioning needs consent plus no harm.

Rule 5320 bars a member from trading for its own account while holding a customer market or marketable limit order, unless the firm's own execution is at the same price or better than the customer's. The customer effectively steps to the front of the line. The rule contains carve-outs worth knowing: trading ahead of certain institutional customers is permitted if the firm has written consent and reasonable policies, and there are exceptions for orders the customer directs to a specific venue. The mechanism is priority, not prohibition on proprietary trading itself. A firm may absolutely trade for its own account; it just cannot take a better fill that a waiting customer order was entitled to receive.

Memory hook:Customer first at the same price or better; written consent unlocks the institutional exception.

Rule 5330 addresses what happens to open orders when the security changes: stock splits, dividends, and rights offerings trigger automatic adjustment of open orders so the customer is not disadvantaged. The order's economic intent is preserved through the adjustment rather than canceled. Rule 5350 governs stop orders and turns on a precise trigger: a sell stop activates on a trade at or below the stop price, and a buy stop activates on a trade at or above it. The trigger is the last sale price, not a quotation. Once triggered, a plain stop becomes a market order, while a stop-limit becomes a limit order at the specified limit price, which may go unfilled in a fast market.

Memory hook:Stops trigger on trades, not quotes; stop-limits can trigger and still not fill.

Rule 2121 requires charges to customers to be fair and reasonable, considering market conditions, expense of execution, and the value of services. In a riskless principal or agency trade, the markup is measured from the prevailing market price, not from the member's own cost, and commissions cannot be duplicated on both sides of the same transaction. Rule 2124 covers net transactions, where the customer pays a single all-in price with no separately stated commission. A net transaction requires the customer's authorization, and the firm must disclose that it will act in a capacity other than a pure agency. The decision rule: every charge must be traceable to a fair basis, and a customer must know what capacity the firm is acting in before the trade.

Memory hook:Markup measures from market, not cost; net deals need authorization and disclosure.

Rule 2265 requires a member to provide a specific risk disclosure to a customer before the customer's first extended-hours transaction. Extended hours means trading outside regular market hours, in pre-market and post-market sessions. The disclosure exists because those sessions differ structurally: fewer participants, thinner liquidity, wider spreads, greater volatility, and the possibility that quotes are stale or that news released after the close moves prices dramatically before the next open. The mechanism is timing: the disclosure must precede the first extended-hours trade, not accompany the confirmation afterward. The customer also needs to understand that limit orders may go unexecuted and that the extended session may not reflect prices available at the next regular open.

Memory hook:Disclose the risks of thin after-hours markets before the first trade, not after.

Rule 611 is the order protection rule, often called the trade-through rule. It prohibits trading through a protected quotation, meaning a venue cannot execute a trade at a price inferior to an automated, immediately accessible, firm quote displayed by another protected venue. The mechanism is a national best bid and offer assembled across exchanges: the best protected bid and best protected ask define the prices a trade must respect. Exceptions exist and are heavily tested: intermarket sweep orders deliberately route through inferior prices while simultaneously sending offsetting orders to the better-priced venues, and self-help lets a venue block another venue's protected status when its quotes are not accessible. Manual, non-automated quotes generally are not protected.

Memory hook:Protected means automated and accessible; ISOs sweep the market legally.

Rule 604 requires trading centers to display customer limit orders that are priced better than the center's own quote, effectively making hidden better-priced customer orders visible to the market unless an exception applies, such as the customer directing otherwise or the order being immediately executed. Rule 612 sets minimum price increments: quotations for NMS stocks priced at one dollar or more must be in increments no smaller than one cent, while stocks under one dollar may be quoted in sub-penny increments. The mechanism connecting them is displayed competition: sub-penny pricing is barred in the over-one-dollar range precisely so orders cannot jump an entire penny ahead of the queue. The decision rule is to check the price level first, then apply the increment.

Memory hook:Over a buck, quote in pennies; under a buck, sub-pennies allowed; better-priced customer limits get displayed.

FINRA Rule 2020 is the industry's core antifraud rule, prohibiting any manipulative, deceptive, or otherwise fraudulent device in connection with securities transactions. It reaches misrepresentation, omission of material facts, and manipulation, and it applies to offers as well as completed trades. Advisers Act Section 206 is the parallel standard for investment advisers, framed as prohibited transactions: an adviser may not defraud any client or prospective client, must observe a fiduciary duty covering both care and loyalty, and faces specific prohibitions such as acting as principal on a client transaction without disclosure and consent, or charging performance-based fees where not permitted. The relationship to remember is capacity: Rule 2020 governs broker-dealer conduct, Section 206 governs advisory conduct, and the same conduct can implicate both.

Memory hook:Rule 2020 polices broker fraud; Section 206 makes advisers fiduciaries who need consent to self-deal.

The exam expects you to route a trade to the right facility based on the security and where the trade occurred. The Trade Reporting Facility, operating in FINRA/Nasdaq and FINRA/NYSE variants, handles trades in NMS stocks executed otherwise than on an exchange, such as internalized equity executions. The OTC Reporting Facility handles trades in OTC equity securities that are not NMS stocks, including OTCBB and other over-the-counter equity securities. The ADF is a quotation and display facility that also accepts trade reports from its participants. The decision rule is two-step: first identify the security type, NMS stock versus non-NMS OTC equity, then identify where the execution happened. Misrouting is a classic distractor answer.

Memory hook:NMS stock off-exchange means TRF; non-NMS OTC equity means ORF; ADF quotes and displays.

Rules 6181 and 6623 require members to report transactions to the applicable facility as soon as practicable, within seconds of execution, so that market data reflects real trading. The report must include accurate execution time, price, size, and capacity. The second half of the mechanism is acceptance: the contra side or its clearing firm must review the incoming report and either accept it or dispute it. A trade that is not timely accepted becomes subject to the facility's locked-in or designated clearing process, where the report stands as submitted and the parties must resolve discrepancies through the rules rather than by simply ignoring the report. The decision rule: report fast, and never let a questionable report sit unanswered.

Memory hook:Report within seconds; accept or dispute, because silence locks the trade in.

Trade reports carry modifiers that tell the facility the context of the execution, such as extended-hours sessions, odd-lot character, or other special conditions, and using the correct modifier is part of accurate reporting. Error correction is a controlled process, not a quiet fix: a member that discovers an erroneous report must notify the other party and the facility, and the facility determines whether the trade will be busted, adjusted, or left to stand. The obligation to honor rules in the 7100 and 7300 series then bind both sides: once a trade is reported and accepted, or locked in, the parties must honor it as reported unless the facility's review process changes it. The decision rule is transparency: corrections go through the facility, never around it.

Memory hook:Fix errors through the facility with notice; a locked-in trade must be honored.

Rules 6183 and 6625 exempt certain alternative trading systems from the trade reporting obligation in specific circumstances — most notably where the ATS executes a transaction with a FINRA member, because the member counterparty carries the reporting duty and the ATS does not duplicate it. The design goal is one report per trade. The exemption is narrow: when the ATS trades with a non-member, no member is reporting, so the ATS's own obligation remains. ATSs also remain subject to Regulation ATS transparency, including recordkeeping, fair access standards, and, for ATSs trading NMS stocks above volume thresholds, public disclosure of operations. Decision rule: identify the counterparties. If a member reports, the exemption applies; against a non-member, the ATS reports.

Memory hook:One trade, one report; a member counterparty reports, so the ATS exemption applies.

The CAT rules make every industry member a data contributor. Members must report the full life cycle of orders and trades: order origination, receipt, routing, modification, cancellation, and execution, with required fields identifying the account, the security, prices, sizes, and timestamps. Rule 6820 requires clock synchronization so every event can be sequenced across the market, and Rule 6890 requires recordkeeping supporting the reported data. The mechanism is reconstruction: regulators use the consolidated trail to rebuild exactly what happened across venues, which is why each report must link to a customer or account identifier and why timing accuracy is enforced. The decision rule is completeness: an unreported event, such as a cancellation or a route, is a violation just like a missing execution.

Memory hook:CAT captures every order event, from receipt to execution, on a synchronized clock.

Rule 13h-1 identifies persons whose trading volume is large enough that the SEC wants a standing record of their activity. The identifying activity levels are built in tiers, starting at two million shares or twenty million dollars in a calendar day, with higher tiers at larger volumes. A person who crosses a threshold receives a large trader ID from the SEC and must provide it to its broker-dealers. The broker-dealer then tags that customer's orders and transactions with the LTID and maintains transaction records so the SEC can reconstruct the trader's activity. The mechanism is tagging, not blocking: nothing prohibits large trading, but it must be identifiable. The decision rule is to monitor daily volume, apply the tier, and ensure the LTID flows through to reports.

Memory hook:Two million shares or twenty million dollars a day earns an LTID that tags every order.

Rule 4511 is the general books and records rule, requiring members to make and preserve the records required by SEA Rules 17a-3 and 17a-4 in a manner consistent with those rules. Rule 5340 requires members to time-stamp orders: the date and time of receipt must be recorded before the order is routed or executed, which is why it is called pre-time stamping. The stamp creates the auditable sequence that later proves fair handling and compliance with priority rules. Rule 4590 requires synchronization of member business clocks to the standard time source, because timestamps are meaningless if different desks run different clocks. The three rules interlock: accurate records depend on accurate stamps, and accurate stamps depend on synchronized clocks.

Memory hook:Stamp the order before it moves; sync every clock so the stamps mean something.

Rules 605 and 606 are public transparency reports, and the exam wants you to keep them straight. Rule 605 requires market centers, the venues that execute orders, to publish quarterly statistics on execution quality: fill rates, price improvement, effective spreads, and speed of execution for covered orders. Rule 606 requires broker-dealers to disclose, also quarterly, where they routed customer orders and any consideration received for that routing, such as payments or rebates. The mechanism is accountability through comparison: customers and regulators can see whether a firm's routing serves the customer or the firm's payment stream. The decision rule is who reports: venues file 605, routing firms file 606. Confusing the two is the most common error.

Memory hook:605 grades the venue's executions; 606 shows where the broker routed and why.

SEA Rule 10b-10 and FINRA Rule 2232 require a broker-dealer to send a confirmation to a customer at or before the completion of the transaction, meaning by settlement, not at the moment of trade. The confirmation is the customer's official record and must state the essentials: identity of the security, number of shares, trade date, settlement date, price, capacity of the firm, commission or markup, and for agency trades, whether the firm acted as agent for the customer, the contra party, or both. Options confirmations carry additional data such as premium, strike, expiration, and underlying security. The mechanism is disclosure at completion: the customer gets a full accounting of the trade's economics in time to verify and object before the deal is settled and closed.

Memory hook:Confirmations arrive by settlement, disclosing capacity, price, and every charge.

SEA Rule 15c6-1 sets the standard settlement cycle for broker-dealer transactions, and following the 2024 amendment the regular way settlement for most securities is trade date plus one business day, T+1. The Uniform Practice Code rules govern the mechanics around that cycle: Rule 11130 covers when-issued and when-distributed contracts, which settle when the security is issued and trade on a forward basis until then; Rule 11140 governs ex-dividend, ex-rights, and ex-warrant mechanics, determining which party receives the corporate benefit; Rule 11320 fixes dates of delivery. On the options side, Cboe 6.2 governs exercise of option contracts and 6.22 governs delivery and payment, with the OCC standing between buyers and sellers, guaranteeing assignment and settlement. The decision rule: identify the product, then apply its cycle.

Memory hook:Most securities settle T+1; when-issued waits for issuance; ex-dates decide who gets the dividend.