Simple definition
A day order is an instruction to buy or sell an investment that stays active only until the end of that trading day. If it does not fill by the closing bell, it is automatically canceled. Think of it like a lunch reservation that only holds for today: if no table opens up, it simply disappears and you start fresh tomorrow.
Why it matters
Knowing an order expires at day's end keeps you from assuming it is still working the next morning. If you set a target price and it never hits that day, the order quietly vanishes, so you decide fresh whether to try again.
Real-life example
Suppose you place a day order to buy a stock only if it drops to 20 dollars. If the price never reaches 20 before the market closes, your order expires unfilled. Nothing was bought, and nothing carries over. The next day you would need to enter a new order if you still want in.
Common mistakes
- Assuming a day order keeps working the next morning after it expires.
- Forgetting you set a target price and being surprised nothing filled.
- Mixing up a day order with one that stays active for many days.
- Re-entering an order the next day without checking the new price.
Pro tips
- Confirm whether your order is a day order or a longer-lasting one.
- Check at the close whether your day order actually filled.
- Use a day order when you only want today's chance at a price.
- Re-enter the order the next day if you still want the trade.
Related Money Dictionary terms
- Market OrderAn instruction to buy or sell an investment right away at the best price currently available.
- Limit OrderAn instruction to buy or sell only at a specific price or better, giving you control over the price you get.
- Stop OrderAn order that turns into a market order once an investment hits a set trigger price, often used to limit losses.
- BrokerA firm or person that carries out your orders to buy and sell investments, often for a fee or commission.
Frequently asked questions
What happens to a day order that does not fill?
It expires automatically at the end of the trading day and is canceled. Nothing is bought or sold, and the order does not carry into the next session. If you still want the trade, you enter a fresh order the following day. This automatic expiration is the defining feature of a day order.
How is a day order different from a longer order?
A day order lasts only until that day's market close. Other orders, sometimes called good-till-canceled, stay active for many days until they fill or you cancel them. The difference is simply how long the instruction remains alive. A day order gives the market a single day to meet your terms.
When would I use a day order?
It suits times when you only want to act on today's prices and would rather rethink tomorrow than leave an order standing. Because it expires on its own, you avoid a forgotten order filling days later at a price you no longer want. Many everyday trades default to day orders.
Knowing what Day Order means is knowledge — the first half. A brick gets placed when you act on it: when placing your next trade, check whether it is set as a day order.
Sources & references
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Plain-English education — not personalized legal, tax, or investment advice.