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what is an at close order in the stock market?
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investopedia defines it in the following way: it's essentially a market order that doesn't get entered until the last minute (or thereabouts) of trading. with this type of order you are not necessarily guaranteed the closing price but usually something very similar, depending on the liquidity in the market and bid-ask for the security in question. traders who believe that a security or market will move more heavily during the last few minutes of trading will often place such an order in the hopes of having their order filled at a more desirable price.
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