After the Federal Reserve announced its latest interest-rate decision, financial markets sold off as the pace of future rate cuts appears that it will be slower than most had expected. During the sell-off, Warren Buffett-led Berkshire Hathaway bought shares of three stocks:

The Berkshire Hathaway CEO spent more than $400 million on Occidental Petroleum shares, which just hit a nearly three-year low amid fears that oil prices may keep falling.

After spending much of Q3 selling shares of various companies including BAC, Warren Buffet is back to taking major long positions.