Order Types

Market Orders

A market order is an instruction to execute the trade immediately at the best available price in the market, with no restriction on the execution price. As confirmed by FINRA’s order types resource, the market order is the most common type of investor order and brokerage firms typically enter orders as market orders unless the investor specifies otherwise. The market order provides certainty of execution — it will be filled as long as a market exists — at the cost of price certainty, because the investor receives whatever price the market currently offers.

Market orders are most appropriate for highly liquid securities in calm market conditions where bid-ask spreads are narrow and the execution price will be close to the last quoted price. They are least appropriate for illiquid securities, in volatile market conditions, or when a specific price is important to the investor’s strategy.

Market orders placed when markets are closed execute at the opening price when trading resumes — which may differ dramatically from the prior closing price if material news occurred overnight. The entry on Market Order in this dictionary covers this topic in full detail.

Limit Orders

A limit order is an instruction to execute the trade only at the specified limit price or better — buy limit orders execute at or below the limit price, and sell limit orders execute at or above the limit price. The limit order provides price certainty at the cost of execution certainty — it may go unfilled if the market never reaches the specified price.

A buy limit order is placed below the current market price. If XYZ stock is trading at fifty dollars and an investor places a buy limit at forty-seven dollars, the order sits in the book until the price falls to forty-seven dollars or below — at which point it executes. A buy limit is never placed above the current market price because it would execute immediately at the current price, making the limit meaningless.

A sell limit order is placed above the current market price. If XYZ stock is trading at fifty dollars and an investor places a sell limit at fifty-three dollars, the order sits in the book until the price rises to fifty-three dollars or above — at which point it executes. A sell limit is never placed below the current market price for the same reason.

The mnemonic BLISS — Buy Limit or Sell Stop — identifies the two order types placed below the current market price. The mnemonic SLOBS — Sell Limit or Buy Stop — identifies the two order types placed above the current market price. These mnemonics are among the most widely used memory tools for Series 7 order type questions. As confirmed by both Achievable’s Series 7 curriculum and the classic Series 7 For Dummies framework, BLISS orders are entered at or below the market price and SLOBS orders are entered at or above the market price. BLiSS orders are also reduced on the ex-dividend date — buy limits and sell stops receive a downward price adjustment equal to the dividend amount when a stock goes ex-dividend, reflecting the mechanical price drop that typically accompanies the ex-dividend date.

The entry on Limit Orders in this dictionary covers this topic in full detail, including FINRA Rule 5320’s prohibition on trading ahead of customer limit orders and Regulation NMS Rule 611’s order protection rules.

Stop Orders

A stop order — also called a stop loss order — is an instruction that remains dormant until the market price reaches or passes through a specified stop price, at which point the stop order is triggered — also called elected — and immediately becomes a market order for execution at the next available price. The stop order is the order type that feels counterintuitive to many students because sell stops are placed below the current market and buy stops are placed above the current market — the reverse of limit orders.

As confirmed by FINRA’s order types resource, a stop order is an order to buy or sell a security once the price of the security reaches the specified stop price, at which point the order automatically turns into a market order and is executed as soon as possible.

A sell stop order is placed below the current market price. An investor holding XYZ stock at fifty dollars might place a sell stop at forty-six dollars to limit potential losses — if the price falls to forty-six dollars, the stop triggers, becomes a market order, and sells at the next available price which is approximately forty-six dollars. The sell stop protects a long position by automatically selling if the price declines to a predetermined level, limiting the loss to approximately four dollars per share plus any slippage below the trigger price.

A buy stop order is placed above the current market price. An investor who has sold XYZ stock short at fifty dollars might place a buy stop at fifty-four dollars to limit potential losses on the short position — if the price rises to fifty-four dollars, the stop triggers and buys shares to cover the short, limiting the loss to approximately four dollars per share. Buy stops can also be used by investors who want to enter a long position once a stock demonstrates upward momentum by breaking through a resistance level — the buy stop purchases shares automatically when the price reaches a specified level.

The critical characteristic of a stop order is that it guarantees triggering when the stop price is reached — but it does not guarantee the execution price after triggering. Because the stop becomes a market order at the moment of triggering, the execution can occur at any price available in the market after the stop price is reached. In a rapidly falling market, a sell stop triggered at forty-six dollars might execute at forty-four or forty-three dollars if the market is moving quickly through multiple prices in sequence. This gap between the trigger price and the execution price — called slippage — is the primary risk associated with stop orders in volatile markets.

Stop-Limit Orders

A stop-limit order is a hybrid that combines a stop order and a limit order — it triggers at the stop price just like a regular stop order, but instead of becoming a market order at that point, it becomes a limit order with the specified limit price. The stop-limit order provides price certainty after the trigger at the cost of execution certainty — once triggered, it may not execute if the market moves through the limit price without filling the order.

The stop-limit order is specified with two prices — the stop price at which it triggers and the limit price at which it will execute. As confirmed by Series 7 For Dummies and the Achievable curriculum, a sell stop limit order places a stop at one price and a limit at a lower price — the order triggers when the market reaches the stop price and then executes only at or above the limit price.

A concrete example illustrates the mechanism. An investor places a sell stop limit order for XYZ stock with a stop at forty-three dollars and a limit at forty-two dollars and ninety cents — written as a sell stop at 43 limit 42.90. The stop triggers when the price falls to forty-three dollars or below.

At that point the order becomes a sell limit at forty-two dollars and ninety cents. If the next trade is at forty-two dollars and ninety-five cents, the order executes — forty-two and ninety-five is above the forty-two-ninety limit.

If the market falls directly through forty-two-ninety to forty-two-eighty-five without trading at or above the limit, the order does not execute and the investor remains in the position.

The stop-limit prevents the execution at an unacceptable price but introduces the risk that no execution occurs at all.

Stop-limit orders are used when investors want the protection of a stop but are unwilling to accept execution at whatever market price follows — they would rather not sell at all than sell below the limit price.

Time-in-Force Specifications

Every order is accompanied by a time-in-force instruction specifying how long the order remains active if not immediately executed. The most commonly tested time specifications are as follows.

A day order expires at the close of the regular trading session — four PM Eastern Time — if not executed. It is the default time-in-force instruction applied to most orders unless the investor specifies otherwise. Market orders are always day orders by default.

A good-till-cancelled order — GTC — remains active until it is either executed or explicitly cancelled by the investor, regardless of how many trading days pass. As confirmed by FINRA’s time parameters resource, brokerage firms typically set a maximum duration for GTC orders — often ninety or one hundred and eighty days — after which the firm cancels the order automatically. Investors must monitor GTC orders carefully because an order placed weeks ago may execute at an unexpected moment if the market finally reaches the specified price during a volatile session.

GTC orders that are BLISS orders — buy limits and sell stops — are adjusted on the ex-dividend date by reducing the order price by approximately the dividend amount, reflecting the price drop that accompanies the ex-dividend date. SLOBS orders — sell limits and buy stops — are not adjusted, because these orders are placed above the market and the ex-dividend price drop would move the market further away from them rather than triggering them unexpectedly.

Quantity Specifications — Partial Fill Rules

When a large order cannot be filled entirely at a single price or moment, the investor may specify instructions governing whether partial fills are acceptable.

An all-or-none order — AON — specifies that the entire order must be filled at the specified price or the order will not execute at all. However, unlike fill-or-kill, all-or-none does not require immediate execution — the broker may make multiple attempts over time to fill the full quantity at the specified price. AON orders remain open until the complete quantity is available at the stated price or the investor cancels them.

A fill-or-kill order — FOK — is the most stringent specification, requiring the entire order to be filled immediately — not just some portion of it — or the entire order is cancelled on the spot. As confirmed by FINRA’s time parameters resource, with an FOK order the firm will execute the entire order immediately or not at all. FOK orders are used primarily by institutional investors executing large block transactions where partial fills create operational complications.

An immediate-or-cancel order — IOC — requires immediate execution of as much of the order as possible at the specified price, with any unfilled portion immediately cancelled. Unlike FOK which requires the entire order or nothing, IOC accepts partial fills and cancels only the remainder. An IOC buy limit at fifty dollars for one thousand shares with only six hundred shares immediately available at fifty executes for six hundred shares and cancels the remaining four hundred immediately.

The SLOBS and BLISS Framework — The Series 7 Memory Tool

The SLOBS and BLISS mnemonic framework is the most widely used memory tool for Series 7 order type questions and is confirmed by multiple Series 7 examination preparation sources as the standard method for rapidly determining where each order type sits relative to the current market price.

BLISS — Buy Limit or Sell Stop — are orders placed below the current market price. Buy limits are below because investors seek to buy at a lower price than currently available. Sell stops are below because they protect long positions from downside price movement.

SLOBS — Sell Limit or Buy Stop — are orders placed above the current market price. Sell limits are above because investors seek to sell at a higher price than currently available. Buy stops are above because they either protect short positions from upside price movement or capture momentum breakouts above a resistance level.

BLISS orders — buy limits and sell stops — are reduced on the ex-dividend date by the dividend amount. SLOBS orders — sell limits and buy stops — are not reduced.

An Order Read as Three Separate Instructions

A completed order answers three different questions, and they are answered independently of one another. The first is the price question: at what price, or on what price condition, the investor is willing to transact. The second is the quantity question: what is to happen if the whole size cannot be obtained on the terms given. The third is the period question: for how long the instruction stands if it cannot be carried out at once. An investor who answers only the first has not given an incomplete instruction so much as accepted the answers convention supplies to the other two, which for most orders means a day order that accepts whatever part of its size the market can supply.

Because the three answers are given separately, two orders can be identical in price and in size and still reach opposite outcomes. Suppose two investors each enter an order to buy one thousand shares of a stock trading at fifty dollars, each with a limit of forty-seven dollars, and the stock falls no further than forty-eight dollars that day before closing there and opening the next morning at forty-six. The first investor entered a day order and holds nothing: the order was withdrawn at the close without ever having been executable. The second entered a good-till-cancelled order and owns the shares, bought the next morning at forty-six dollars or better. Nothing about the price the two investors chose explains the difference between them.

The quantity answer, by contrast, is inert on an order the market can fill whole. An instruction about partial fills speaks only to the case where the full size is not available on the terms stated, so an order for one hundred shares entered into a market offering several thousand at the price behaves the same way whether the investor attached a partial-fill instruction to it or not. This is why the quantity question is the one most often left unanswered, and why its answer becomes visible only on an order large enough, or a market thin enough, for the full size to be in doubt.

A Restriction on Quantity Is a Restriction on Execution

A condition attached to the quantity reduces the chance of any execution in the same way a condition attached to the price does. The price condition narrows the set of market prices at which the order may trade; the quantity condition narrows the set of market depths at which it may trade. An order carrying both conditions is executable only where the market satisfies both at once, so the two restrictions compound rather than operate in parallel: the order needs the price to arrive and the full size to be there at the moment it arrives.

The consequence is that a price condition which has been satisfied does not by itself produce an execution. An all-or-none order for five thousand shares at forty-seven dollars can sit unexecuted through a session in which the stock trades at forty-seven dollars repeatedly, if each time it does so only a few hundred shares are available there. The order has not been refused and the price has not been missed; the complete quantity was never available at the stated price at one moment, which is the condition the instruction imposes. An investor reading only the day’s price range would conclude the order ought to have filled.

Relaxing the price condition on an unexecuted order means accepting a worse price, and relaxing the quantity condition does not: the same five-thousand-share order at forty-seven dollars, entered without the all-or-none instruction, would have taken the few hundred shares available at each touch of forty-seven and accumulated part of the position at exactly the price the investor named. What the investor gives up is completeness, not price.

All-or-None, Fill-or-Kill and Immediate-or-Cancel on One Set of Facts

The three partial-fill instructions can be separated completely by running them against a single sequence of events. An investor enters an order to buy one thousand shares at a limit of fifty dollars. At the moment of entry six hundred shares are offered at fifty dollars and nothing more; an hour later a single seller offers twelve hundred shares at fifty dollars. Under an all-or-none instruction nothing happens at entry, because six hundred is short of the one thousand required, and the order fills in full an hour later when the twelve hundred shares appear: the investor ends with one thousand shares. Under a fill-or-kill instruction the order is cancelled at entry, because one thousand shares were not available at that moment, and the investor ends with nothing and no order. Under an immediate-or-cancel instruction six hundred shares are bought at entry and the remaining four hundred are cancelled on the spot, so the investor ends with six hundred shares and nothing working when the twelve hundred shares arrive.

An order carrying no quantity instruction at all behaves differently again on the same facts: six hundred shares are bought at entry and the remaining four hundred stay working at fifty dollars, so the investor owns six hundred shares at the end of the first minute and one thousand at the end of the hour. The ordinary result where a market cannot supply a whole size at once is therefore a part-filled order whose remainder continues under the period instruction, and each of the three qualifiers is a departure from that result rather than a refinement of it.

The fill-or-kill instruction leaves the investor with no order working after the moment of entry, and the all-or-none instruction leaves one. An all-or-none order can execute hours or days later, at a price the investor named but on a day the investor may no longer want it; an order with no quantity instruction leaves a working remainder that can do the same with part of the size. Fill-or-kill destroys the order instead of leaving it, which matches a reason for trading that belongs to the moment and expires with it.

Matching the Period to the Distance to the Price

How long an order needs to remain active follows from how far its price condition sits from the current market, because the order can execute only in a session in which that price is actually reached. A condition set close to the market may well be reached within hours; one set far from it depends on a move that no single session is likely to deliver. The period instruction is therefore not a separate preference about administration but the investor’s estimate of how long the required move will take, and an order whose period is shorter than that estimate has been entered in a form that cannot work.

The arithmetic makes the point concrete. A stock trades at fifty dollars and an investor enters a buy limit at forty-seven dollars. The move required is three dollars, and three dollars measured against the fifty-dollar starting price is six percent. As a day order, that six percent decline has one session in which to happen, and by the convention of the United States equity markets the order is withdrawn at the close of that regular session whether or not the decline is still under way. As a good-till-cancelled order, the same six percent decline has every session until the firm’s own maximum duration is reached. The investor has not changed the price target between the two cases; only the number of opportunities the target is given has changed.

Entering the same price afresh each morning as a day order and entering it once as a good-till-cancelled order differ in where the burden of acting falls. A succession of day orders requires an act of the investor in every session for the target to remain live, so a day on which the investor does nothing is a day on which the target is not pursued. A single good-till-cancelled order requires an act only to stop it, so a day on which the investor does nothing is a day on which the target is pursued anyway. The two arrangements express the same price view, and they fail in opposite directions when the investor’s attention lapses.

Why an Order Rests Above or Below the Market

Whether an order rests above or below the current market follows from what the order is for, and not from whether it buys or sells. An order entered to obtain a price better than the market now offers must rest on the far side of the market from the investor’s own interest: better for a buyer means lower, and better for a seller means higher. An order entered to react to a price move against the position must rest in the direction the investor fears: downward for a holder of stock, upward for a short seller. Purpose fixes the side, and the buy-or-sell label follows from the purpose rather than determining the placement.

A limit order and a stop order entered on the same side of the market therefore rest on opposite sides of the current price. For a stock trading at fifty dollars, both a buy limit and a buy stop are instructions to buy, yet the buy limit must sit below fifty dollars and the buy stop above it, because the first is seeking a better price than fifty and the second is waiting for the price to confirm a move through fifty. The same is true of the two sell orders in mirror image. Two orders on the same side of the market can thus be separated by the whole width of the current price, and an investor who reads placement off the buy-or-sell label alone will place half of them wrongly.

Because the two purposes point to opposite sides, an investor holding a position can stand one resting order above the market and one below it at the same time. On a holding in a stock trading at fifty dollars, a sell limit at fifty-three dollars records the price at which the investor would take the gain and a sell stop at forty-six dollars records the price at which the investor would stop bearing the decline. The pair spans seven dollars, three above the market and four below it, and each order remains in force until its own price is reached or the investor cancels it, neither of them depending on the other.

The Order in Which Prices Arrive

A resting order acts on the first arrival of its price, which means the sequence in which prices are reached decides the outcome and the range the session covered does not. An investor reading a session’s high and low can see which resting orders were reachable but not which of them actually acted, because two orders can both have had their prices touched while only the one touched first could have done anything. The question a resting order answers is not whether the market visited a price but when it did so relative to the other prices that mattered.

Take the pair of orders just described: a holding in a stock at fifty dollars, a sell limit at fifty-three dollars and a sell stop at forty-six dollars. In a session that falls from fifty to forty-six and then recovers to fifty-three, the stop is reached first, becomes an order to sell at the next available price, and the shares are sold at about forty-six dollars; when fifty-three arrives there is nothing left for the sell limit to sell. In a session that rises from fifty to fifty-three before falling to forty-six, the limit is reached first and the shares are sold at fifty-three dollars or better; when forty-six arrives the stop has nothing to sell. The same two orders, the same two prices and the same two extremes produce proceeds of about forty-six dollars a share in the first session and at least fifty-three in the second, a difference of about seven dollars a share decided by sequence alone.

An order left standing after its counterpart has executed no longer corresponds to anything the investor holds. In the first of those two sessions the sell limit at fifty-three dollars survives the sale of the position, and it is still an instruction to sell shares the investor no longer has; in the second the sell stop at forty-six dollars survives in the same condition. Neither order knows that the position has gone, because each was given as a price instruction and not as an instruction about the position, and a good-till-cancelled order of either kind remains active until it is executed or cancelled. The cancellation is the investor’s to make.

One Price Below the Market, Two Opposite Intentions

A single price below the current market can be the price at which one investor intends to buy and another intends to sell. A buy limit resting at forty-six dollars under a fifty-dollar market records a wish to own the stock, entered by someone who does not own it and considers forty-six a better price than the market offers. A sell stop resting at the same forty-six dollars records a wish to stop owning the stock, entered by someone who does own it and treats forty-six as the point at which the decline has gone far enough. The level is identical and the intentions are opposite.

A single decline therefore sets off orders of both kinds at once. If the stock falls from fifty dollars to forty-six, the holder’s sell stop at forty-six is triggered and the other investor’s buy limit at forty-six becomes executable in the same move, so one four-dollar decline — eight percent of the fifty dollars the stock started at — is the event that makes one investor a seller and the other a buyer at the same price. A resting order below the market is for that reason no evidence at all about the direction its owner expects: the same level can hold an order placed in hope of a decline and an order placed in fear of one.

The two orders resting at one price are not symmetrical in what they actually obtain. The buy limit is an instruction about price and will execute at forty-six dollars or lower, so the decline continuing past forty-six cannot worsen the buyer’s price. The sell stop is an instruction about a condition, and once forty-six dollars is reached it becomes an order to sell at the next available price, so the decline continuing past forty-six makes the seller’s price worse. One price level, reached in one move, is a ceiling for the buyer and no floor at all for the seller.

Errors That Come From the Specification Rather Than the View

An all-or-none instruction given on an order the investor needs executed the same day works against that objective. The instruction withholds the partial fill that would have achieved most of the size, so an order for five thousand shares that could have taken four thousand of them at the stated price executes for none, and the investor ends the day with no position rather than with four-fifths of one. The instruction does what it says: it is the objective of completeness being given priority over the objective of executing, and the error is in attaching it to an order whose purpose was the second of those.

An investor who watches only the price can have an order end for a reason that has nothing to do with price. A day order can lapse at the close in a session in which the price came within a cent of the limit, and a good-till-cancelled order can be cancelled by the firm on reaching the firm’s maximum duration in a market that is still moving toward the limit. In both cases the order has gone and the price view that produced it has not been tested, and nothing about the price chart records the event.

An order that has not executed has three possible explanations, and only one of them concerns the investor’s view of the price. The price condition may never have been reached, which is a judgement about the market the investor got wrong. The period may have run out first, which is a judgement about time. The quantity condition may have gone unsatisfied even while the price was reached, which is a judgement about depth. An investor who reviews unexecuted orders by asking only whether the price was right is examining one of the three, and the other two leave exactly the same trace: an order that was entered and did not trade.

Examination Relevance and Key Takeaways

Order types are tested extensively on the SIE, Series 7, and Series 65 examinations covering market order execution mechanics, limit order price guarantees, stop order triggering and election, stop-limit hybrid mechanics, time-in-force specifications, and partial fill qualifiers.

The key points to retain are these.

Market orders execute immediately at the best available price — certainty of execution, no certainty of price. Limit orders execute only at the specified price or better — buy limits at or below the limit, sell limits at or above the limit — providing price certainty without execution certainty. Stop orders trigger when the market reaches the stop price and then become market orders — sell stops are placed below the market to protect long positions, buy stops are placed above the market to protect short positions or capture breakouts. Stop-limit orders trigger at the stop price and then become limit orders rather than market orders — providing price protection after triggering at the cost of possible non-execution.

BLISS — buy limit or sell stop — are placed below the current market price and are adjusted downward on the ex-dividend date. SLOBS — sell limit or buy stop — are placed above the current market price and are not adjusted on the ex-dividend date. Day orders expire at the close of the trading session. GTC orders remain active until executed or cancelled, subject to firm-imposed maximums. All-or-none requires full quantity at the specified price with multiple fill attempts permitted. Fill-or-kill requires the entire order filled immediately or the entire order is cancelled. Immediate-or-cancel fills as much as possible immediately and cancels the remainder.