恐慌指数VIX涨穿20关口，为6月份以来首次

Core Insights - The VIX index, a measure of market volatility, has risen above the 20 mark for the first time since June, indicating increased investor anxiety [1] - The S&P 500 index has experienced a decline of over 100 points, with a drop of 1.64% [1] Market Reaction - The significant increase in the VIX suggests a shift in market sentiment towards caution and risk aversion [1] - The decline in the S&P 500 reflects broader market concerns, potentially impacting investor strategies and asset allocation [1]