One sector that is especially sensitive to Fed Days is the banking sector (BKX). BKX closed down on Monday about 2.5%. The study below looks at drops of 2% or more on the day before a Fed Day, and how the BKX responded on the Fed Day.
Instances are a little low here but the stats are overwhelming. Below I have listed all instances.
Not shown in all the above stats is that the average run-up was 4.2% and the average drawdown just -0.6% during the Fed Day. Overall risk/reward appears strongly favorable for BKX based on the limited sample size.