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Unusual to see the S&P500 close higher every day of options expiration week. Only 19 occurrences since 1990. The last ten times in a row, and 14 out of 19 since 1990 led to a lower S&P500 close the following Monday. Losses were typically small, usually peaking at the 0.6% level. Gains were typically large on the few occasions they did occur.

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