Since the May 3 Berkshire Hathaway annual meeting in which Warren Buffett said it was time for him to start stepping back, the stock has suffered a steady decline. Technician Frank Cappelleri said Wednesday on CNBC's " Worldwide Exchange " that the stock is "extremely oversold and that's only happened a few times in the last few years, we're about to see another rally." Cappelleri, the founder of CappThesis, correctly called the stock's 15% rise early this year. During that run-up, the S & P was flat and the XLF SPDR Financials ETF was up half as much as Berkshire Hathaway. Then the stock began to fall. Since the May high, the stock is down 12%. "When we've seen down patterns like we've seen recently in this stock, we have seen recoveries" he said. This all comes amid reports details on a

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