Among the stock activity stories for Friday, Aug. 3, from AP Business News:
— Shares of Whole Foods Market Inc. rose after a Morgan Stanley analyst upgraded the stock, citing the specialty grocery chain's potential to significantly grow its footprint over the next several years.
— Zipcar Inc. shares tumbled to an all-time low after the car-sharing network reported lower-than-expected revenue in the second quarter and cut its annual estimates.
— OpenTable Inc.'s stock jumped after the online restaurant reservation company's second-quarter results topped Wall Street's estimates.
