Watching the best investors provides terrific insight. Purchases and sales of stocks made by active institutional investors reveal how they see the market and the economy. However, it's important to remember that these investors have different goals, time frames, and resources than most of us, so it isn't practical to mirror their every move.

Warren Buffett's illustrious investing holding company Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) has made interesting trades lately; upping its stake in oil stocks with Occidental Petroleum (NYSE: OXY), opening a new banking position in Citigroup (NYSE: C), and continuing to build its monster stake in Apple (NASDAQ: AAPL). Let's take a closer look.

Gas prices have come down a bit but continue causing Americans pain at the pump. High gas prices are no fun, but investors can use sky-high oil prices to their advantage with energy stocks. Oil stocks typically pay hefty dividends and earn tons of cash flow when fuel prices rise. 

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Source Fool.com