[] () a situation where people buy and sell more shares, bonds, etc. than normal on a particular day, because sales of two types of options or futures must be completed双重巫时（期权或期货合约同时到期）◆Friday was a double-witching day, with futures and options expiring.周五是一个双重巫时，期货和期权合约同时到期。➡triple-witching