Comparing U.S. and European market volatility responses to interest rate policy announcements

- U.S. implied volatility (VIX) declines on FOMC meeting days.
- European implied volatility (VDAX) declines on FOMC meeting days.
- U.S. and European implied volatility is not generally related to ECB meeting days.

We examine the responses of U.S. (VIX) and German (VDAX) implied volatility indices to the announcement of interest rate policy decisions by the Federal Open Market Committee (FOMC) and the European Central Bank (ECB). We present new findings that indicate that VDAX declines on FOMC meeting days, a result that holds for nearly all announcement types. VDAX declines on ECB meeting days in which there is a negative rate surprise, or no surprise, and is unrelated to ECB meeting days otherwise. We confirm prior findings that VIX declines on FOMC meetings days regardless of the content of the meeting, but we also find that VIX is unrelated to ECB announcements. Results from our structural VAR analysis indicate that VIX (VDAX) responses to FOMC decisions are related to risk aversion (uncertainty). Taken collectively, our results indicate a prominent position for the FOMC in determining implied volatility levels worldwide.