The opposite holds true, as well. When the FOMC indicates lower-than-expected interest rates going forward, market forces will usually push stock prices higher.
It’s important to remember that market expectations are key. If analysts on Wall Street already expect the FOMC to raise interest rates throughout the year, and it does exactly that, it won’t have much impact on the stock market. When reality doesn’t align with expectations -- which is often the case -- the FOMC can have a big impact on the stock market.