Study guide
Function 1 of the official FINRA outline, Trading Activities, supplies 41 of the Series 57 exam's 50 scored questions, and this chapter covers its structural core: how market makers register and quote, what each order type actually does, and the risk controls and volatility safeguards that keep electronic markets orderly. Master this material first, because nearly every other topic on the exam assumes you understand it.
Becoming a Market Maker: Registration, MPIDs, and Quote Withdrawal
A market maker is a firm that stands ready to buy and sell a security for its own account on a regular and continuous basis. On Nasdaq and the other equity exchanges, a firm must register as a market maker with the exchange and then register separately in each security it intends to quote. Once registered in a security, the firm owes a two-sided obligation: it must maintain a continuous bid and offer during regular trading hours, at prices reasonably related to the prevailing market, meaning within prescribed percentages of the national best bid and offer. Each quoting firm is identified by its market participant identifier, or MPID, a short code such as HALW for the fictional Halloway Capital. A firm may hold a primary MPID and request supplemental MPIDs for separate trading desks, but every MPID that displays a two-sided quote carries the same obligations. Quotes are also firm under the SEC's quote rule: a market maker must trade at its published price up to its displayed size, and refusing to honor a quote, known as backing away, is a violation. When a market maker needs to stop quoting, the distinction between excused and unexcused withdrawal matters. An exchange may grant an excused withdrawal for circumstances beyond the firm's control, such as equipment failure, or for legal and regulatory reasons, such as becoming an underwriter subject to Regulation M restrictions. A firm that simply pulls its quotes without an excuse faces a penalty; on Nasdaq the firm is generally barred from re-registering as a market maker in that security for 20 business days.
The Order Type Toolbox
The exam expects fluency in order types because a trader's whole job is choosing the right instruction. A market order demands immediate execution at the best available price, with no price protection; in a fast market the fill can be far from the last sale. A limit order sets a ceiling for a buy or a floor for a sell, guaranteeing price but not execution. A stop order lies dormant until the stock trades at or through the stop price, then becomes a market order; a stop-limit order becomes a limit order instead, which protects price but can miss the exit entirely if the stock gaps through the limit. Market-on-open and market-on-close orders participate in the opening and closing crosses and receive the official auction price; exchanges impose entry and cancellation cutoffs shortly before each cross, and those cutoff times vary by exchange, so verify them for the venue you trade. A pegged order floats with a reference price rather than sitting still: a primary peg tracks the same side of the national best bid and offer, a market peg tracks the opposite side, and a midpoint peg rests between them, repricing automatically as the market moves. A reserve order, often called an iceberg, displays only part of its size while holding the remainder in an undisplayed reserve that replenishes the displayed portion as it executes. For example, Dana at Halloway Capital might work a 50,000 share buy as a reserve order showing 500 shares at a time, keeping her full interest hidden from other participants.
The Market Access Rule: SEA 15c3-5 Pre-Trade Risk Controls
Exchange Act Rule 15c3-5, the market access rule, applies to any broker-dealer that has access to trade directly on an exchange or alternative trading system, and to any broker-dealer that provides that access to customers, a practice called sponsored or direct market access. The rule's purpose is to ensure that no order reaches the market without first passing through risk controls that are under the broker-dealer's own direct and exclusive control; unfiltered or naked access, where a customer's orders flow straight to the market using the firm's identifier without pre-trade checks, is prohibited. The required controls come in two families. Financial risk controls prevent orders that would breach pre-set credit thresholds for each customer or capital thresholds for the firm itself, and they block clearly erroneous orders by rejecting those that exceed reasonable price or size parameters, appear duplicative, or arrive in patterns suggesting a malfunction. Regulatory risk controls are reasonably designed to ensure compliance with all rules that apply on a pre-trade basis, for example confirming a locate before a short sale, screening against restricted lists, and limiting system access to authorized, pre-approved traders. Suppose Halloway Capital sponsors a hedge fund's access to an exchange: Halloway, not the fund, must own and administer the risk checks, though in limited cases it may allocate certain regulatory controls to a customer that is itself a registered broker-dealer. The firm must review the effectiveness of its controls at least annually, and its chief executive officer must certify annually that the controls comply with the rule.
Clearly Erroneous Trades, the ADF, and Alternative Trading Systems
Errors happen even with good controls. Suppose a trader at Brightline Securities means to sell 1,000 shares at 40 but fat-fingers a market order for 100,000 shares, crashing the price to 31. The exchange clearly erroneous rules, the 11890 series, let a party ask the exchange to review the trades, generally within 30 minutes of execution. An exchange officer compares execution prices to a reference price, ordinarily the last sale before the event, and applies numerical guidelines: during regular hours an execution is generally reviewable when it deviates from the reference price by about 10 percent for stocks priced up to 25 dollars, 5 percent for stocks over 25 up to 50 dollars, and 3 percent for stocks above 50 dollars, with wider bands outside regular hours. Trades ruled clearly erroneous are broken, the ruling binds both parties, and a limited appeal process exists; since limit up-limit down bands now prevent most extreme prints, these petitions are rarer than they once were. The chapter's other structural pieces sit off the exchanges. The Alternative Display Facility, or ADF, is a FINRA facility where members that choose not to quote on an exchange can display quotations and report trades in NMS stocks; the ADF displays and reports but does not execute or route orders. An alternative trading system, or ATS, is a non-exchange venue that matches buyers and sellers. An ATS must register as a broker-dealer and comply with Regulation ATS, including filing Form ATS or the more detailed public Form ATS-N for NMS stock systems, and fair access obligations apply once an ATS reaches significant volume thresholds. ATSs that display no quotes publicly are commonly called dark pools.
Prohibited Practices, Trading Halts, and Limit Up-Limit Down
Several conduct rules are tested heavily. Spoofing and layering mean entering orders you intend to cancel before execution to paint a false picture of supply or demand, then trading the other way; both are forms of market manipulation, as are wash trades and marking the close. FINRA Rule 5270 prohibits front running: a trader who knows of an imminent customer block transaction, generally an order of 10,000 shares or more or one with substantial market impact, may not trade the security or a related instrument such as an option on it until the block information is public or stale. Rule 5280 requires firms to keep trading desks from exploiting advance knowledge of the content or timing of the firm's research reports, and Rule 5240 bans coordinating quotes, prices, or trade reports with other firms and prohibits threatening, harassing, or retaliating against another market participant to influence its quoting. When markets themselves become disorderly, official mechanisms intervene. A primary listing exchange can impose a regulatory halt, for example when material news is pending, and FINRA can halt OTC equity trading in comparable circumstances. FINRA Rule 6190 obligates members to comply with the limit up-limit down plan for NMS stocks: a security may not trade outside price bands calculated around a reference price, the average trade price over the preceding five minutes. Bands are roughly 5 percent for Tier 1 securities, 10 percent for other NMS stocks, and wider for low-priced stocks, and they widen further late in the trading day for many securities. If the market sits at a band for 15 seconds, a limit state becomes a five-minute trading pause. Marketwide circuit breakers based on S&P 500 declines of 7, 13, and 20 percent halt all equity trading.
Key terms
- Market participant identifier (MPID)
- — The short code identifying a quoting or reporting firm; a firm may hold a primary MPID plus supplemental MPIDs, each carrying full quoting obligations when used to display two-sided markets.
- Two-sided quote obligation
- — A registered market maker's duty to maintain a continuous bid and offer during regular hours at prices reasonably related to the market, within prescribed percentages of the NBBO.
- Excused withdrawal
- — Exchange permission to stop quoting a security for reasons such as system failure or Regulation M underwriting restrictions; withdrawing without an excuse generally bars re-registration in the security for 20 business days on Nasdaq.
- Backing away
- — A market maker's failure to honor its published quotation up to its displayed size, a violation of the SEC firm quote rule.
- Pegged order
- — An order whose price automatically tracks a reference point, such as the same side of the NBBO (primary peg), the opposite side (market peg), or the midpoint.
- Reserve (iceberg) order
- — An order that displays only part of its size while an undisplayed reserve replenishes the displayed portion as executions occur.
- Market-on-close (MOC) order
- — An order to participate in the closing auction at the official closing price; exchanges impose entry and cancellation cutoffs before the cross, and cutoff times vary by venue.
- Market access rule (SEA 15c3-5)
- — The rule requiring broker-dealers with or providing market access to maintain pre-trade financial and regulatory risk controls under their direct and exclusive control, with annual review and CEO certification.
- Clearly erroneous transaction
- — An execution at a price substantially away from the prevailing market that a party may petition the exchange to review, generally within 30 minutes, under the 11890 rule series; trades ruled erroneous are broken.
- Alternative Display Facility (ADF)
- — A FINRA facility for displaying quotes and reporting trades in NMS stocks by members trading otherwise than on an exchange; it does not execute or route orders.
- Alternative trading system (ATS)
- — A non-exchange trading venue that must register as a broker-dealer and comply with Regulation ATS, including Form ATS or ATS-N filings; non-displayed ATSs are commonly called dark pools.
- Limit up-limit down (LULD)
- — The NMS plan, implemented for FINRA members through Rule 6190, that blocks trades outside price bands around a five-minute average reference price; a 15-second limit state triggers a five-minute trading pause.
Exam tips
- Keep the withdrawal consequences straight: excused withdrawal requires exchange permission for cause, while an unexcused withdrawal on Nasdaq generally means no re-registration in that security for 20 business days.
- Stop versus stop-limit is a classic trap: a stop order guarantees the exit but not the price once triggered, while a stop-limit guarantees the price but may never execute if the stock gaps through the limit.
- For 15c3-5, remember two families of controls, financial and regulatory, and two annual obligations, the effectiveness review and the CEO certification; the controls must stay under the broker-dealer's direct and exclusive control.
- Tie each prohibited practice to its rule number: 5270 is front running of blocks, 5280 is trading ahead of research, and 5240 is coordination and intimidation; spoofing and layering are manipulation regardless of rule number.
- For LULD, memorize the sequence: reference price is the prior five-minute average, a quote stuck at the band for 15 seconds creates a limit state, and an unresolved limit state becomes a five-minute trading pause declared by the primary listing exchange.