Market Organization and Structure

Equity Investments, LOS weight share 3.3 percent of the 365 Level I learning outcomes.

Equity InvestmentsMarket Organization and Structure

A stop order does not promise a price. A short seller's downside does not have a floor.

Before you watch

Answer these three first. Getting them wrong now is normal, and it helps the lesson stick. Reveal the answers when you're done, then read on.

1. An investor places a stop-limit sell order: stop price $50, limit price $48. The stock gaps from $53 straight down to $44 without trading between $50 and $48. What happens to the order?

Answer: C. When price reaches $50, the stop triggers and a limit sell at $48 activates, but the market is already at $44, below that limit. A limit order never fills below its limit price, so the order sits unfilled while the loss continues. A plain stop order (no limit) would have converted to a market order and executed at $44.

2. An investor buys 200 shares at $50 with 50% initial margin and 25% maintenance margin. At what price will she receive a margin call?

Answer: B. Margin call price = P0 x (1 - initial margin) / (1 - maintenance margin) = $50 x 0.50 / 0.75 = $33.33. Taking 25% of the original price and subtracting it ($37.50) ignores that the dollar amount of the loan is fixed while the position's value is what is actually falling.

3. An investor short sells 100 shares at $80. Initial margin is 50%, maintenance margin is 30%. At approximately what price will she receive a margin call?

Answer: B. Short positions use the plus-sign formula, because rising prices, not falling ones, hurt a short seller: P* = P0 x (1 + initial margin) / (1 + maintenance margin) = $80 x 1.50 / 1.30 = $92.31. Applying the long formula to a short position gives a price below $80, which is backwards for a short seller's risk.

The lesson

The video lesson for this unit is recorded and waiting to be published. Everything it teaches is written out below.

The reading

Five to ten minutes on this one unit: what the exam wants, the idea in plain words, then straight into the trap and the practice.

The exam wants you to tell primary from secondary market transactions, classify an order's execution, validity and clearing instructions, calculate a margin call price for both a long and a short position, and calculate the return on a leveraged position and the leverage ratio behind it.

One question decides primary versus secondary: who receives the money. If the issuer gets the proceeds, an IPO, a seasoned offering, a private placement, a rights offering, the transaction is primary. If proceeds go to a selling investor instead, ordinary exchange trading years after the IPO, it is secondary. Apple's 1980 IPO raised money for Apple; every trade in Apple stock since then has raised nothing for the company. Secondary markets exist to support primary ones: an investor buying into an IPO accepts a lower yield because they know they can exit later on a secondary market, and without that exit option issuers would have to pay a far larger premium to attract capital at all.

An order carries three separate kinds of instruction, and the exam tests each one independently. Execution instructions say how the order fills. A market order guarantees execution but not price. A limit order guarantees a price or better but not execution. A stop order sits inactive until price reaches the stop level. At that point it converts into a market order and fills at whatever price is next available, which in a fast or gapping market can be well worse than the stop price itself. A stop-limit order tries to fix that problem by converting to a limit order instead. It can then fail to execute at all if the market gaps straight through both the stop and the limit. Validity instructions say how long an order stays active. Good-till-cancelled stays open until cancelled. A day order expires at the close. Fill-or-kill requires the whole order to fill immediately or cancels the entire thing. Immediate-or-cancel fills whatever portion it can right away and cancels only what is left. Clearing instructions say how the trade settles, ordinary T+2 settlement or cash settlement, a category candidates often overlook by focusing only on execution and validity.

Margin calls run on two different formulas. The sign each one uses follows the direction that actually hurts the position. For a long position, falling prices are the danger, so the formula subtracts: margin call price = P0 x (1 - initial margin) / (1 - maintenance margin). The loan amount is fixed while a falling price shrinks the investor's equity, and the call triggers once price drops below this level. For a short position, rising prices are the danger, so the formula adds instead: margin call price = P0 x (1 + initial margin) / (1 + maintenance margin). A short seller owes more to repurchase borrowed shares as the price climbs, and the call triggers once price rises above this level. The two formulas' opposite signs are not arbitrary. They follow directly from which direction of price movement erodes each position's equity.

Leverage amplifies a position's return by a predictable multiple. The leverage ratio equals 1 divided by the initial margin percentage, so a 50 percent initial margin gives 2x leverage, and a 25 percent initial margin gives 4x. The return on the equity actually invested equals the underlying stock's own percentage return multiplied by that leverage ratio. It always uses equity invested, never the full position value, as its base. Leverage is symmetric. It amplifies a loss exactly as much as it amplifies a gain. A short position's maximum loss has no ceiling at all, since there is no upper bound on how high a stock's price can rise before the short is forced to buy it back.

Worked in full

An investor buys 300 shares at $60 on margin, with an initial margin of 40 percent and a maintenance margin of 30 percent. At what price does the position trigger a margin call? This is a long position, so the formula subtracts: P* = P0 x (1 - IM) / (1 - MM) = $60 x (1 - 0.40) / (1 - 0.30) = $60 x 0.60 / 0.70 = $51.43. If the stock falls below $51.43, the investor's equity has dropped to exactly 30 percent of position value, and the broker issues a margin call.

The same problem, one step removed

Same position: bought at $60, initial margin 40 percent, maintenance margin 30 percent. Confirm this is a long position, set up P* = P0 x (1 - IM) / (1 - MM), and finish the calculation yourself.

The trap

A margin-call question that supplies both initial and maintenance margin numbers is testing whether you use the maintenance margin, not the initial margin, in the denominator; a margin call fires when equity falls below the maintenance level, and the initial margin only ever matters at the moment the position was opened.

Learning outcomes covered by this module

Verbatim from the 2026 CFA Level I topic outline. Every practice question and key rule below is tagged to one of these where the stem and explanation make the match clear.

  1. explain the main functions of the financial system
  2. describe classifications of assets and markets
  3. describe the major types of securities, currencies, contracts, commodities, and real assets that trade in organized markets, including their distinguishing characteristics and major subtypes
  4. describe types of financial intermediaries and services that they provide
  5. compare positions an investor can take in an asset
  6. calculate and interpret the leverage ratio, the rate of return on a margin transaction, and the security price at which the investor would receive a margin call
  7. compare execution, validity, and clearing instructions
  8. compare market orders with limit orders
  9. define primary and secondary markets and explain how secondary markets support primary markets
  10. describe how securities, contracts, and currencies are traded in quote-driven, order-driven, and brokered markets
  11. describe characteristics of a well-functioning financial system
  12. describe objectives of market regulation

Key rules

Written from this module's own lesson and the 2026 CFA Level I topic outline, in teaching order, each tagged to the learning outcome it belongs to where that is clear.

LOS 09

One question decides primary versus secondary: who gets the money

If the issuer receives the proceeds, IPOs, seasoned offerings, private placements, rights offerings, it is a primary-market transaction. If proceeds go to a selling investor instead, ordinary exchange trading, it is secondary. A stock trading on the NYSE decades after its IPO produces nothing for the issuer; every one of those trades is secondary.

LOS 09

Secondary markets support primary markets through liquidity and price discovery

Investors accept lower yields in the primary market because they know secondary markets let them exit later. Without that liquidity, issuers would have to pay a much larger premium to attract capital in the first place.

LOS 07

Three separate instruction categories, each answering a different question

Execution instructions say how to fill an order (market, limit, stop, stop-limit). Validity instructions say how long it stays active (day, good-till-cancelled, fill-or-kill, immediate-or-cancel). Clearing instructions say how the trade settles (regular T+2 settlement, cash settlement). Cash settlement is always a clearing instruction, a common point candidates miss by focusing only on execution and validity.

General

A stop order does not guarantee its stop price

When price reaches the stop, the order converts to a market order and fills at the next available price, which in a fast or gapping market can be well worse than the stop price itself. A stop-limit order tries to control the fill price but can fail to execute at all if price gaps through both the stop and the limit.

General

A limit order fills at the limit price or better, never at a fixed price

A buy limit at $45 can fill at $40 if the market offers that, better for the buyer than the limit. The limit sets the worst acceptable price, not the exact execution price.

General

Fill-or-kill and immediate-or-cancel are not the same partial-fill rule

Fill-or-kill requires the entire order to fill immediately or the whole order is cancelled, with no partial fills allowed. Immediate-or-cancel fills whatever portion it can right away and cancels only the unfilled remainder.

LOS 06

Long margin calls use minus signs, because falling prices hurt longs

Margin call price (long) = P0 x (1 - initial margin) / (1 - maintenance margin). The call triggers when price falls below this level, because the loan amount is fixed while the position's value, and therefore the investor's equity, is shrinking.

LOS 06

Short margin calls use plus signs, because rising prices hurt shorts

Margin call price (short) = P0 x (1 + initial margin) / (1 + maintenance margin). The call triggers when price rises above this level, because a short seller owes more to repurchase borrowed shares as the price climbs.

LOS 06

Leverage is the reciprocal of initial margin, and it cuts both ways

Leverage ratio = 1 / initial margin. At 50% initial margin, leverage is 2x; at 40%, it is 2.5x; at 25%, it is 4x. Return on the margin investment equals the leverage ratio times the stock's own return, amplifying gains and losses equally, since the denominator is always the equity actually invested, never the total position value.

General

A long position's maximum loss is bounded; a short seller's is not

A long position can fall to zero at most, a maximum 100% loss. A short position's loss grows with the stock price, which has no upper bound, so the theoretical maximum loss on a short sale is unlimited. A short seller also owes any dividends paid on the borrowed shares to the lender.

The trick

Authored only where a key rule has an arbitrary number, list, or formula shape worth a memory device; a module with none of those has no tricks here, on purpose.

Who receives the money?

The one-question test for primary versus secondary markets. The issuer, primary. Anyone else, secondary. Apple's IPO in 1980 was primary; every NYSE trade in Apple since then is secondary.

A stop order becomes a market order

Not a price guarantee, a trigger. Once hit, it fills at whatever the next available price is, which is why gapping markets can produce ugly surprises.

LONG uses MINUS, SHORT uses PLUS

The margin-call formulas' sign direction follows the direction of pain. Falling prices hurt longs (subtract), rising prices hurt shorts (add).

Leverage ratio = 1 / initial margin

50% margin doubles exposure, 40% margin gives 2.5x, 25% margin gives 4x. Multiply the stock's own return by this ratio to get the return on the equity actually invested.

I owe you

A short seller owes borrowed shares back, owes any dividends paid in the meantime, and can owe an unlimited amount if the price keeps rising. Three separate obligations, one mnemonic.

The method

Authored, ordered steps for answering this module's question types; a calculation module's calculator-dependent step ends with a bracketed BA II Plus keystroke sequence.

  1. For a primary-versus-secondary question, ask only one thing: does the issuer receive the proceeds from this transaction?
  2. For an order-type question, classify the instruction into execution (how), validity (how long) or clearing (how it settles) before matching it to a specific term.
  3. For a stop or stop-limit scenario, trace the sequence exactly: does the stop trigger, and if it converts to a limit order, can that limit actually fill at the resulting market price?
  4. For a margin-call question, identify long or short FIRST, then apply the matching formula: minus signs for long, plus signs for short.
  5. For a return-on-margin question, always divide by the equity actually invested (initial margin percent times position value), never by the full position value; the leverage-ratio shortcut (1 / initial margin) checks the answer quickly.
  6. [BA II Plus: ['Margin call price: no TVM worksheet needed, just P0 x (1 - IM) / (1 - MM) for a long position, or P0 x (1 + IM) / (1 + MM) for a short position, computed directly.', "Return on margin investment: compute equity invested = initial margin x position value, then gain / equity invested; cross-check with leverage ratio (1 / IM) x the stock's own percentage return."]]

One card

Condensed from the key rules and tricks above, nothing new. What you'd want on one index card the night before.

Practice questions

Pick an answer, say how sure you are, then reveal. Every wrong choice gets its own explanation. 10 question(s) available for this unit.

Question 1Exam level

An investor places an order to sell 500 shares of XYZ Corp. at the best available price immediately. What type of order is this, most likely?

How sure are you?

Correct: B. A market order is an instruction to buy or sell immediately at the best available price. It prioritizes certainty of execution over price. The investor is not specifying a price constraint. She simply wants the trade executed now. Limit orders specify a maximum buy price or minimum sell price (controls price, not certainty). Stop orders are conditional on the price reaching a trigger level first.
A. A limit order specifies a maximum buy price or minimum sell price. It controls price, not immediacy, and may not execute at all if the market never reaches that price.
C. An all-or-none order is a condition on quantity (fill the whole order or none of it). It says nothing about price or timing the way a market order does.

Unit: market-organization-and-structure

Question 2Exam level

An investor submits a limit order to buy shares at $45. The current ask price is $48. Which of the following best describes the outcome?

How sure are you?

Correct: B. A buy limit order at $45 means the investor will not pay more than $45. Since the current ask is $48, the order cannot execute at current prices. It enters the limit order book and waits. If the ask falls to $45 or below, it will execute. It may never execute if the price never reaches $45. Option A is wrong because limit orders do NOT execute at the ask when the limit is below the ask.
A. Option A is wrong because limit orders do NOT execute at the ask when the limit is below the ask.
C. You might think the order is invalid because it cannot be filled at the current ask price, but limit orders are not rejected for being below the ask; they are held in the order book until the price is favorable or canceled, which contrasts with the immediate rejection suggested in choice C.

Unit: market-organization-and-structure

Question 3Exam level

A trader holds a long position in a stock currently trading at $60. To protect against a sharp decline, she places an order to sell if the price falls to $55. What type of order is this, most likely?

How sure are you?

Correct: A. This is a stop sell (stop-loss) order. The $55 is the stop (trigger) price, not the limit price. Once the market price falls to $55, the order is activated and becomes a market order to sell. The exam tests whether students know that a stop order becomes a market order upon trigger. It does NOT guarantee execution at $55. If the price gaps from $57 to $52 overnight, the order triggers at $55 but executes at the next available price, potentially $52. A limit sell at $55 would only execute at $55 or higher. That is the key difference.
B. You might be tempted by a market order with a price condition because it seems to activate at a specific price, but a market order, even with a condition, does not act as a trigger to sell; instead, a stop sell order with a trigger at $55 is designed to become a market order once the price hits $55, fulfilling the trader's intent to sell if the price falls to that level.
C. You might be thinking that a limit order is needed to sell at a specific price, but a good-till-cancelled limit order would not automatically trigger a sale when the price hits $55, unlike a stop sell order which becomes a market order once the trigger price is reached.

Unit: market-organization-and-structure

Question 4Exam level

Which of the following transactions occurs in the primary market, most likely?

How sure are you?

Correct: B. Primary markets are where issuers sell securities directly to investors and receive the proceeds. In a seasoned equity offering (SEO), Microsoft issues new shares. Proceeds go to Microsoft. This is a primary market transaction. Options A, B, and D all involve trades between investors where the issuer receives nothing. The NYSE trade (A), OTC bond trade (B), and broker-facilitated swap (D) are all secondary market transactions. The defining test: does the ISSUER receive the proceeds? If yes, it is primary. If no, it is secondary.
A. You might be tempted to choose A because it involves a financial institution and an OTC dealer, which can seem like a primary market transaction, but in reality, the hedge fund is simply buying from another fund, not from the issuer, making it a secondary market transaction where the issuer, in this case the U.S. Treasury, does not receive any proceeds.
C. You might be tempted by choice C because it involves a broker, which can make it seem like a primary market transaction, but remember, the broker here only facilitates the swap between two pension funds, not the issuance of new securities, making it a secondary market transaction.

Unit: market-organization-and-structure

Question 5Exam level

Which of the following best describes how secondary markets support primary markets?

How sure are you?

Correct: B. The CFA curriculum's key argument: investors are willing to buy securities in the primary market BECAUSE they know they can sell them in the secondary market. If secondary markets did not exist, investors would demand a massive liquidity premium, making it prohibitively expensive for issuers to raise capital. Secondary markets provide: (1) liquidity. Investors can exit, (2) price discovery. Continuous pricing signals. Options A and D are wrong. Regulation and underwriting are not secondary market functions. Option B is wrong. SEOs happen in primary markets.
A. Option B is wrong. SEOs happen in primary markets.
C. You might be tempted by choice C if you confuse the roles of primary and secondary markets, as underwriting new securities is actually a function of primary markets, not secondary markets, which instead focus on providing liquidity and price discovery for already issued securities.

Unit: market-organization-and-structure

Question 6Exam level

An investor places a stop-limit order to sell with a stop price of $50 and a limit price of $48. The stock is currently trading at $55. If the stock price falls rapidly from $53 to $44 without trading at prices between $50 and $48, what happens to the order, most likely?

How sure are you?

Correct: C. This is the classic stop-limit trap. When the price falls to $50, the stop is triggered and a LIMIT sell order at $48 is activated. However, the price has already fallen below $48 to $44. The limit order will not execute below $48. The stock gaps through both the stop and limit prices, so the order sits unfilled in the book while the investor suffers the full loss. This is the critical difference between stop-limit and plain stop orders: stop-limit orders can FAIL TO PROTECT in fast-moving markets. A plain stop order would have converted to a market order at $50 and executed at $44.
A. You might think the order executes at $48 because the limit price is reached, but this overlooks the fact that once triggered, a limit order only executes at or better than the limit price, and since the price fell below $48 to $44 without trading at $48, the order does not get filled.
B. You might be thinking that once the stop price is hit, the order turns into a market order, but this ignores the limit price restriction; the order is a limit sell at $48, not a market order, so it will not execute at $44.

Unit: market-organization-and-structure

Question 7Exam level

A 'good-till-cancelled' (GTC) order most likely differs from a 'day order' in that:

How sure are you?

Correct: A. GTC and 'day' are validity instructions. They determine how long the order remains active. A day order expires at close if not filled. A GTC order remains in the book until the investor cancels it or it executes. Option A is wrong. GTC can be applied to any order type including market orders (though this is unusual). Option C is wrong. Neither type guarantees execution; a limit GTC order can sit forever unfilled.
B. Option C is wrong. Neither type guarantees execution; a limit GTC order can sit forever unfilled.
C. Option C is wrong. Neither type guarantees execution; a limit GTC order can sit forever unfilled.

Unit: market-organization-and-structure

Question 8Exam level

Which of the following is most likely a clearing instruction, not an execution or validity instruction?

How sure are you?

Correct: B. The CFA curriculum classifies order instructions into three categories: (1) Execution instructions. Specify how to fill (market, limit, stop, stop-limit, market-if-touched, etc.); (2) Validity instructions. Specify when to fill or cancel (day, GTC, fill-or-kill, all-or-none, immediate-or-cancel, good-on-close); (3) Clearing instructions. Specify how to settle (regular settlement T+2 for equities, cash/same-day settlement, delivery vs payment). Cash settlement is a clearing instruction. Market orders, stop orders, and GTC are in the other two categories.
A. You might be tempted to choose Good-till-cancelled because it sounds like a settlement term, but it actually specifies the duration of the order validity, not the settlement method like same-day settlement does.
C. You might be tempted by a stop order because it involves a condition for execution, but remember that a stop order is an execution instruction that triggers a market or limit order once a specified price is reached, unlike cash settlement which is a clearing instruction specifying how to settle the trade.

Unit: market-organization-and-structure

Question 9Above the exam

An investor places a stop-loss sell order at $45 with no limit, on a stock currently trading at $50. Overnight, unexpected bad news causes the stock to gap down and open trading the next day at $38, with no trades occurring between $45 and $38. Combining the mechanics of a stop order with the absence of a limit price, the order will most likely:

How sure are you?

Correct: B. A stop order (with no limit) becomes a MARKET order once the stock trades at or through the stop price; it does not guarantee execution AT the stop price itself. When a stock gaps down past the stop price with no trades in between, the stop is triggered by the gap and the resulting market order executes at the next available price, here approximately the $38 opening price, which can be significantly worse than the $45 stop price in a fast-moving or gapping market.
A. A gap through the stop price still triggers the order; the stop does not require an actual trade to occur exactly at $45 to activate. Once the market price moves through (or opens below) the stop level, the order is triggered and converts to a market order.
C. A stop order, once triggered, becomes a MARKET order, not a guaranteed fixed-price order; it has no price protection at all once activated, which is exactly why it can execute far away from the stop price during a gap, unlike a stop-LIMIT order.

Unit: market-organization-and-structure

Question 10Above the exam

An investor wants to sell short 100 shares of a stock and simultaneously wants strict protection against paying more than $52 to close the position later if the stock trades erratically. Combining the mechanics of a stop order with those of a limit order, the investor's buy-to-cover protective order should most likely be structured as:

How sure are you?

Correct: B. A stop-limit order combines a stop price (which triggers the order) with a limit price (which caps the worst price the investor will accept). For an investor who wants BOTH activation near $52 AND strict protection against paying materially more if the stock gaps, a stop-limit order is the correct tool: a plain stop order offers no price protection once triggered, while a plain limit order alone provides no trigger mechanism tied to the stock reaching $52 in the first place.
A. A plain stop order does not guarantee execution at the stop price; once triggered it becomes a market order with no price ceiling, exactly the opposite of the 'strict protection' the investor wants against paying more than $52.
C. A market order provides no price protection whatsoever; it simply executes immediately at whatever price is currently available, which could be far worse than $52 in a fast-moving market, the opposite of what the investor is asking for.

Unit: market-organization-and-structure

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