BUY MINUS ORDER

Used in the context of general equities. Rare market or limit order to buy a stated amount of a stock provided that the price to be obtained is not higher than the last sale if the last sale was a minus or zero-minus tick , and is not higher than the last sale minus the minimum fractional change in the stock if the last sale was a plus or zero-plus tick . (if limit, then the buy cannot occur above the limit, regardless of tick .)