Papa John's International, Inc.’s PZZA shares jumped 8.9% on news that Trian Partners was considering the pizza chain as a takeover targetShares of Microsoft Corporation MSFT increased 1.3% after the company said that it was investing in Grab, a Singapore-based ride-hailing service providerAffimed N.V.’s AFMD shares plummeted 24.4% after the company suspended trials on a cancer drug following the death of a patientShares of Starbucks Corporation SBUX jumped 2.1% after investor Bill Ackman said that his hedge fund Pershin Square Capital Management LP now held stakes worth $900 million or approximately 1.1% in the companyWant 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 Microsoft Corporation (MSFT): Free Stock Analysis Report Affimed N.V. (AFMD): Free Stock Analysis Report Papa John's International, Inc. (PZZA): Free Stock Analysis Report Starbucks Corporation (SBUX): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research