One of Warren Buffett's favorite holdings, Occidental Petroleum (NYSE: OXY), just exhibited a "Death Cross" pattern on its stock chart following a period of significant volatility, potentially foreshadowing a further decline in price. As of the latest close, OXY shares are trading at $60.18, decreasing 0.59% in the latest trading session, thus adding to the losses of 1.71% suffered in the bearish signal that forebodes a period of diminished returns. Amid the weaker performance of the overall energy sector i ...