Among the stock activity stories for Tuesday, Aug. 7, from AP Business News:
— Shares of Leap Wireless International Inc., the nation's sixth largest cellphone carrier, hit an all-time low after it reported the loss of a record number of subscribers.
— Shares of Tumi Holdings Inc. soared after the high-end luggage maker reported a second-quarter profit that handily beat Wall Street expectations and a Credit Suisse analyst upgraded the stock.
