Options expiry on Friday 20 Nov: on past ones the S&P 500 moved a median 0.46% either way, against 0.50% on other sessions
Closed up on 52% of the 80 past dates, against 55% of other sessions · the session after was up 57% of the time · S&P 500 index closes from 8 Nov 2016 to 6 Nov · history, not a forecast · The third Friday, or the session before when it is closed
Markets · Market plumbing · Cboe and OCC expiration rules (dates); S&P Dow Jones Indices (S&P 500 daily closes) · 19 Nov 2026