Heisenberg(@Mr_Derivatives):$SPX How the last trading day of September EOQ Window Dressing closed since 2009: 2025: +.41% 2024: +.42% 2023: -.27% 2022: -1.51% 2021: -1.19% 2020: +.83% 2019: +.50% 2018: +.00% 2017: +.37% 2016: +.80% 2015: +1.91% 2014: -.28% 2013: -.60% 2012: -.45% 2011: -2.50% 2010: -.31% 2009: -.33% In other words, no pattern, no trend, just straight randomness. I guess outside 2018, can expect elevated volatility to both up or downside if that.

Heisenberg

@Mr_Derivatives

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Heisenberg@Mr_Derivatives

2026.09.08 23:01

$SPX How the last trading day of September EOQ Window Dressing closed since 2009: 2025: +.41% 2024: +.42% 2023: -.27% 2022: -1.51% 2021: -1.19% 2020: +.83% 2019: +.50% 2018: +.00% 2017: +.37% 2016: +.80% 2015: +1.91% 2014: -.28% 2013: -.60% 2012: -.45% 2011: -2.50% 2010: -.31% 2009: -.33% In other words, no pattern, no trend, just straight randomness. I guess outside 2018, can expect elevated volatility to both up or downside if that.