If we would happen to continue to drop today, there have been 8 times the S&P 500 futures have dropped four straight days into an option expiration. Expiration Friday was positive 6 of those 8 times by an average of +0.8%. Buying at Thursday's close and selling at Monday's open led to 7 of 8 positive trades averaging +1.3% (the one loser was -0.2%).