The typical advice in the financial market is to never blindly follow a whale investor like Warren Buffett. However, these investors' reverse-engineering investment decisions can often prove helpful. Today, Warren Buffett didn't buy more shares of Occidental Petroleum Co. NYSE: OXY because the economy is slowing but because a commodity supercycle could be about to push oil prices higher. Occidental Petroleum Today OXY Occidental Petroleum $61.17 +0.97 (+1.61$55.12 ▼ $71.18 Dividend Yield 1. ...