Market Orders Explainer
A market order instructs a broker to buy or sell promptly at the best prices available when the order reaches the market. It prioritizes execution over a guaranteed price, making it most predictable in liquid securities with stable quotes and modest order size.
The latest trade is not a promise of the next price. A buy order generally interacts with available asks and a sell order with available bids. If the order is larger than the size at the best quote, the remainder can execute at additional price levels.
News, volatility, market openings, halts, thin trading, and routing delays can cause slippage between the expected and average fill. Brokers may split an order across venues, and each execution can appear separately even though the investor entered one instruction.
Market orders are simple, but they can be costly when price protection matters. Investors should check spread and depth, consider a marketable limit order, and avoid assuming that a visible quote will remain available throughout a large or fast-moving transaction.
The order seeks an immediate trade at available prices.
No single execution price is guaranteed.
A large order can consume several price levels.
The best quote may cover only part of the order.
News, openings, and halts can move quotes quickly.
Limit protection may be more appropriate when price matters most.
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