Market Order

The simplest and most common type of stock tradeis a market order. Market orders simply tell your broker that you are willing to take whatever price is presented to you when your order is executed. These orders are often subject to the lowest commission since they are the easiest to execute.

Imagine you want to buy 100 shares of Apple. The current market price is $181. You log into your brokerage account or call your broker directly on the phone and tell him, “Place a market order for 100 shares of Apple Computer, ticker symbol AAPL.” By the time the order is executed a few seconds later, the market price may be higher or lower; $181.50 or $180.60, for example. Your total cost before commissions will vary accordingly.

Limit Order

A limit order allows you to limit either the maximum price you pay or the minimum price you are willing to accept when buying or selling a stock. The primary difference between a market order and a limit order is that your stock broker cannot guarantee that the latter will be executed.

Imagine you want to buy 300 shares of U.S. Bank stock. The current price is $55 per share. You do not want to pay more than $52, so you place a limit order set to execute at $52 or less. If the stock falls to that price, your order should be executed.

There are three considerations you should take into account before placing a limit order:

  • The stock price may never fall (or rise) to the limit you’ve established. As a result, your order may never be executed.
  • Limit orders are executed by your broker in the order they are received. It is possible that the stock you are interested in buying (selling) will reach your limit price yet your trade will not be filled because the price fluctuated above (below) your limit before the broker could get to your order. It is less common in the age of electronic trading.
  • If there is a sudden drop in the stock price, your order will be executed at your limit price. In other words, imagine the stock you want is trading at $50 per share. You have a limit order placed at $48 per share. The CEO resigns, and in a single session, the stock plummets to $40 per share. As the security was falling in price, your order was executed. You are now sitting on a loss of $8 per share.

To protect yourself from sudden market shifts, many professionals recommend that all stock trades, whether you are buying or selling shares, be placed as limit orders. 

All or None

Normally, when you purchase a substantial amount of a company’s common stock, your broker will fill your order over the course of several hours, days, or even weeks, as opportunities arise. This will prevent you from “moving the market” – or drastically increasing (decreasing) the price of the stock by flooding the market with a single, huge order.

At times, however, you may want to place an order at a single price. The solution is to place an all-or-none trade. All-or-none trades essentially tell your broker that you do not want your trade executed unless he can do so in a single transaction.

Besides the usual caveats, there are some additional considerations before placing an all-or-none order:

  • Your all-or-none order will not be executed if there are not enough shares available in a single transaction to cover it.
  • All-or-none orders are not placed until all of the orders ahead of it with no special conditions are executed.
  • All-or-none orders can only be applied in conjunction with a limit order; market orders are not eligible. 

Stop and Stop Limit

In common parlance, stop and stop limit orders are known as “stop loss” orders because speculators use them to lock in profits from profitable trades. Most investors don’t concern themselves with these kinds of orders, but its worth understanding how they work.

stop order automatically converts into a market order when a predetermined price is reached (this is referred to as the “stop price”). At that point, the ordinary rules of market orders apply; the order is guaranteed to be executed, you simply don’t know the price – it may be higher or lower than the current price reported on the ticker symbol.

Contrast that to a stop limit order, which automatically converts into a limit order (not a market order) when the stop price is reached. As discussed earlier in this tutorial, your order may or may not be executed depending upon the price movement of the security.

Sell Short and Buy to Cover Orders

Selling short or shorting a stock is an extremely speculative practice that can, theoretically, lead to unlimited losses. It can also allow you to profit from a stock falling. 

Here’s how it works: You think that Company ABC is grossly overvalued. You are convinced the stock is going to fall substantially from its current price of $10 per share.

Day and GTC and Extended Hours Trading

When you place an order, you must give it an expiration date. Day orders are good until the end of the trading day, at which point they are canceled; all market orders are placed as day orders. Good-till-Canceled (GTC) orders, however, remain open until one of three things occurs:

  1. They are completely filled
  2. You cancel the order
  3. 60 calendar days pass

There are risks in using Good-till-Canceled orders:

  • You may forget you placed the order; a lot can change in 60 days!
  • If you place a large trade with Good-till-Canceled status, you will pay a commission each day your order is partially filled. If, on the other hand, your order is filled by multiple transactions in a single day, your broker should only charge you a single commission.

Extended Hours Orders

The extended hours market allows you to place trades between 8 p.m. and 8 a.m.; times when the market is traditionally closed. This system permits investors to react to corporate announcements and news prior to the next session.

Trailing Stop

One way to protect gains and limit losses automatically is by placing a trailing stop order. With a trailing stop order, you set a stop price as either a spread in points or a percentage of current market value.

Imagine you purchased 500 shares of Hershey at $50 per share.  The current price is $57. You want to lock in at least $5 of the per share profit you’ve made but wish to continue holding the stock, hoping to benefit from any further increases. To meet your objective, you could place a trailing stop order with a stop value of $2 per share.

In practical terms, here is what happens: Your order will sit on your broker’s books and automatically adjust upwards as the price of Hershey’s common stock increases. At the time your trailing stop order was placed, your broker knows to sell HSY if the price falls below $55 ($57 current market price – $2 trailing stop loss = $55 sale price).

Imagine Hershey increases steadily to $62 per share.  Now, your trailing stop order has automatically kept pace and will convert to a market order at a $60 sale price ($62 current stock price – $2 trailing stop value = $60 per share sale price). It should provide a capital gain of $10 per share.

Bracketed Orders

Bracketed orders go one step further than trailing stop orders. Just like the latter, you set a trailing stop as either a percentage or fixed spread (recall that on the previous page, our trailing stop was $2 for Hershey). Also, however, you can establish an upper limit that, when reached, will result in the stock being sold.

Going back to our Hershey Chocolate example, let’s now assume you placed a bracketed order with a trailing stop level of $2 per share and an upper limit of $65 per share. The bracketed order will behave the same as the trailing stop order, with the $2 trailing stop automatically ratcheting up as the price increases. The difference? When and if Hershey hits $65, the bracketed order will automatically convert into a market order and should be immediately executed by your broker.


  • Market orders guarantee execution but not price.
  • Limit orders guarantee price but not execution.
  • All-or-none orders are only executed if the broker has enough shares, as a block, to fill your order in a single transaction.
  • A stop order automatically converts to a market order when a predetermined price (the stop price) is reached. A stop loss order, on the other hand, automatically converts to a limit order when the stop price is reached.
  • When you sell short, your potential losses are theoretically unlimited.
  • Day orders expire at the end of a trading day. Good-till-canceled orders stay on the books until they are completely filled, canceled, or sixty calendar days have passed.
  • Trailing stop orders can be used to lock-in profits while potentially benefiting from the increased rise in stock price.
  • Bracketed orders are the same as trailing stop orders, except that they require an upper limit trigger price which, when reached, results in the stock being sold.