Key TakeawaysThe S&P 500 slipped 0.3% on Tuesday, Nov. 12, the benchmark index's first negative trading day since last week's election.Mosaic shares plunged after the fertilizer maker missed quarterly estimates and announced the resignation of a key executive.Shares of Tyson Foods surged as increasing beef and chicken sales helped the meat processor top sales and profit forecasts. Major U.S. equities ticked lower as the post-election rally that lifted major indexes to record highs lost momentum a week after ...