Vanguard Mid-Cap Index Fund ETF Shares (VO)

Last Closing Price: 80.24 (2026-07-17)

Put-Call Implied Volatility Ratio (30-Day)

Put-Call Implied Volatility Ratio: The ratio of implied volatilities of the at-the-money puts to the at-the-money calls.

Vanguard Mid-Cap Index Fund ETF Shares (VO) had 30-Day Put-Call Implied Volatility Ratio of 1.0068 for 2026-07-17.