Key TakeawaysThe S&P 500 fell 0.2% on Tuesday, July 23 as quarterly earnings results from an array of companies took center stage.UPS shares lost ground after the package delivery giant reported lower-than-expected quarterly results and trimmed its full-year guidance.Shares of MSCI soared as recurring revenue growth helped the provider of financial indexes beat quarterly sales and profit estimates. After wavering for much of the day, major U.S. equities indexes slipped in the afternoon to end Tuesday in neg ...