From Longman Business Dictionarytriple-witchingˌtriple-ˈwitching (also triple-witching hour) noun [singular] informal FINANCE a time on a financial market when FUTURES, STOCK INDEX FUTURES, and STOCK OPTIONs all EXPIRE (=reach the end of their life) at the same timeFriday’s triple-witching hour will see three sets of options and futures contracts expire on the German Futures and Options Exchange. → compare double-witching
