Quadruple witching day, + Triple Witching HOUR20 Sep 2019 15:42
The third Friday of September is typically a quadruple witching day, which sounds like magic but actually describes a logical yet hectic event. The four things the “quadruple” refers to are the expiration of contracts for stock index futures, stock index options, stock options, and single stock futures.
Triple Witching HOUR
Triple witching hour is the last hour of the stock market trading session on the third Friday of every March, June, September, and December.