Tracking SDS historical volatility helps you see how much ProShares UltraShort S&P500 -2x Shares's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, ProShares UltraShort S&P500 -2x Shares's HV tells you what really happened. Use our scanner to monitor SDS 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.
Historical volatility is the annualized standard deviation of an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The SDS 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing ProShares UltraShort S&P500 -2x Shares's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.
ProShares UltraShort S&P500 seeks daily investment results, before fees and expenses, that correspond to two times the inverse (-2x) of the daily performance of the S&P 500.
Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts ProShares UltraShort S&P500 -2x Shares's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where SDS HV is running hot, cold, or in line. Make the SDS 30 day historical volatility — and every other window — work for your edge instead of against it.
