Among the stock activity stories for Friday, June 14, from the Associated Press:
— Shares of drug developer Synergy Pharmaceuticals Inc. rose after its chairman disclosed that he'd bought more of the company's stock.
— Shares of Codexis Inc. jumped after the company said it reached an important milestone in development of detergent alcohols made from biomass.
— InvenSense Inc. shares rose after a Piper Jaffray analyst said he thinks the technology company's revenue will pick up in the next few months, with Apple Inc. possibly providing an important boost.
— American Express Co. shares fell after a Barclays analyst lowered his rating on the credit card company's stock.
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