Someone doublecheck this for me:
1. Monthly and quarterly options contracts expire today.
https://www.investopedia.com/terms/t/triplewitchinghour.asp
https://cdn.cboe.com/resources/options/Cboe2025OPTIONSCalendar.pdf
2. Robinhood and AppLovin will be in the S&P 500 before trading starts on Monday.
https://www.investopedia.com/robinhood-applovin-and-emcor-stocks-trade-higher-on-news-of-s-and-p-500-inclusion-11805185
3. Vanguard, BlackRock, and StateStreet need to make massive institutional purchases of HOOD and APP for VOO, IVV, and SPY after options contracts expire this afternoon, regardless of price.