A 10-year market study reveals significant differences in price volatility between ETFs and individual stocks. ETFs like SPY, IWM, QQQ and DIA experience outlier moves (defined as twice the daily expected move) only 1.6-2.3% of the time, with SPY going up to 567 days without a significant outlier.
In contrast, individual stocks like Tesla, AMD, Palantir and Lululemon saw 81% more outlier events and spent 42% fewer days in calm periods compared to ETFs. Western Digital (WDC) showed the shortest period without outlier moves.
The data supports selling premium on ETFs during low volatility periods, while individual stocks may offer better opportunities when implied volatility is high. This explains the current popularity of 0DTE SPX trading strategies among premium sellers.