RE: And then there were none..."Quad Witch" - "Quadruple Witching" is a term that stock brokers use to refer to a day on which four major contracts - stock index futures, stock index options, stock options and single stock futures - all expire. Trading on these days is typically volatile, especially during the "Quadruple Witching Hour", which is the hour before the markets close (3 p.m. to 4 p.m. ET). Quadruple witching happens on the third Friday of March, June, September, and December.https://www.investopedia.com/terms/q/quadruplewitching.asp3
The reason that a quadruple witching day may have volatile trading conditions is that many investors want to unwind their interests in futures and options contracts prior to the contract expiration date. Stock trading increases as investors replace or repurchase existing contracts.https://web.streetauthority.com/terms/q/quadruple-witching.asp4
Possibility of aftermarket NR?