UnitedHealth Group Incorporated’s UNH shares declined 2.6% after the company reported fiscal second-quarter 2018 total operating cost of $51.9 billion, up 12% year over yearShares of Comerica Incorporated CMA rose 1.3% after the company reported second-quarter fiscal 2018 adjusted earnings of $1.87 per share, surpassing the Zacks Consensus Estimate of $1.62 per shareWalmart, Inc.’s WMT shares jumped 0.6% after the company announced that it has entered into a five-year deal with Microsoft Corporation MSFT for expanded use of its cloud and AI technologyShares of The Goldman Sachs Group, Inc. GS declined 0.2% after the company reported fiscal second-quarter 2018 non-compensation expenses of $2.66 billion, up 24% from the year-ago figureWant the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Comerica Incorporated (CMA): Free Stock Analysis Report Microsoft Corporation (MSFT): Free Stock Analysis Report The Goldman Sachs Group, Inc. (GS): Free Stock Analysis Report UnitedHealth Group Incorporated (UNH): Free Stock Analysis Report Walmart Inc. (WMT): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research