In This Story BRK.A -0.82% AAPL -0.39% BAC -1.24% AMZN -2.87% KO -0.01% Warren Buffett’s Berkshire Hathaway ( BRK.A -0.82% ) is gearing up to report its first-quarter earnings Friday. And as usual, Wall Street will be paying close attention to what Warren Buffett says about the tumult in today’s markets and economy, as well as what the Oracle of Omaha’s crystal ball tells him about the future. Suggested Reading Apple tops Wall Street earnings expectations but its closely watched services