Berkshire Hathaway Inc (NYSE:BRK) (NYSE:BRK), the investment firm led by Warren Buffett, will be reporting first-quarter earnings on Saturday, May 4. Wall Street expects $4.57 in EPS and $80.41 billion in revenues as the company reports before market hours. The stock is up 21% over the past year, 12.07% up year-to-date. Berkshire Hathaway’s ‘Apple Risk’ Berkshire Hathaway investors are increasingly questioning its growth prospects. At a forward P/E of 20.56, its valuation as a large tech company doesn’t appear justified by its portfolio composition to many, particularly its heavy investment in Apple Inc (NASDAQ:AAPL). The concentration risk of Apple, accounting for 50.19% of its total investment portfolio is seen as a potential risk — the ‘Apple risk’. Related: Wall Street Analyst Warns Apple Stock Could Get ‘Killed’ And ‘Would Not Be Surprised If Buffett Is Selling Right Now’ Berkshire’s growth mainly comes from its insurance segment, while other areas show limited growth. With future growth prospects uncertain, Berkshire’s valuation appears inflated and above historical norms. Let’s look at what ...