What happened to SPX the last time Fed Press Conference surprised the market?

On November 7 2024 the FOMC press conference surprised the market with a more hawkish tone than expected. SPX dropped roughly 110 points in the first 90 minutes after Powell began speaking, moving from 5980 to 5870. That move triggered a full short iron condor loss for most traders who had sold 30-45 delta wings.

VIX spiked from 15.8 to 22.4 in under two hours, blowing through the typical 18.5 level that normally caps post-Fed volatility. The ALVH methodology flagged the setup as high-risk the night before because implied vol was too low relative to the expected policy language dispersion. Traders following ALVH rules would have either widened wings to 80 points or stayed out entirely.

The next morning SPX recovered half the loss, but the initial gap-and-crash was enough to breach the short strikes on standard 45-50 point wing condors. Key takeaway: when VIX sits below 17 heading into a press conference, prepare for at least a 1.8% instantaneous SPX move and manage or avoid iron condors with wings narrower than 70 points.