Implied Volatility (Calls): The forecasted future volatility of the security over the selected time frame, derived from the pricing of the at-the-money call options with the relevant expiration date.
Vanguard S&P Small-Cap 600 Growth Index Fund ETF Shares (VIOG) had 10-Day Implied Volatility (Calls) of 0.2310 for 2026-05-21.