all or none



  • noun a buying order which stipulates that the whole order has to be bought at a certain price and no parts of the order can be executed separately.


  • A type of order to buy or sell a security that instructs a broker to fill the order completely or not at all. For example, if an investor placed an all or none order to sell 500 shares of stock at $10 per share or better, the broker would not sell any of the shares unless all of them could be sold at the limit price.