Sellers of those puts who want to be neutral are forced to sell more SPX futures, as the SPY approaches each put heavy strike. Such option-related selling is better known as delta-hedging ...

AM-Expiration cash-settled options for indices such as SPX, RUT, VIX, etc. have a unique method of settlement. As a result, the last day to trade or close out of AM-expiring options is the day before ...