Warren Buffett has been in the headlines lately, with Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) shares having risen to all-time highs in recent weeks. Big uncertainties about exactly how the Federal Reserve will handle interest rates to fight inflation are giving investors headaches, but at least on Thursday morning, it appeared that market participants would get a reprieve from the volatility. The move followed filings from Berkshire Hathaway with the U.S. Securities and Exchange Commission reporting the Omaha-based company's acquisition of a massive position in HP stock.