· Shares of American International Group AIG rose 0.2% after reporting second-quarter 2017 operating income of $1.53 per share that surpassed the Zacks Consensus Estimate by 27.5%· Shares of Kellogg Co. K increased 4.3% after reporting second-quarter comparable earnings of $0.97 per share, beating the Zacks Consensus Estimate of $0.92· Shares of Fitbit Inc. FIT surged 15.1% after posting adjusted earnings of -$0.18 cents per share, higher than the Zacks Consensus Estimate of -$0.22· Shares of Aetna Inc. AET increased 2.5% after reporting second-quarter 2017 earnings of $3.42 per share, surpassing the Zacks Consensus Estimate of $2.34Want 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 Fitbit, Inc. (FIT): Free Stock Analysis Report Kellogg Company (K): Free Stock Analysis Report American International Group, Inc. (AIG): Free Stock Analysis Report Aetna Inc. (AET): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research