Movers Roundup: McKesson, Motorola

Among the stock activity stories for Wednesday, March 11, from AP Financial News:

NEW YORK (AP) — Shares of McKesson Corp. skidded Wednesday due to concerns that one of the pharmacy benefits manager's biggest customers, drugstore operator Rite Aid Corp., could default on its loans this year.

SAN FRANCISCO (AP) — Motorola Inc.'s shares advanced Wednesday after an analyst upgraded the stock on signs the cell phone maker has been cutting costs faster than expected and plans a blitz of new smartphone models.

NEW YORK (AP) — Shares of Exelon fell to a new 52-week low on Wednesday after an analyst downgraded the electric utility based on its hedging profile and expectations that its earnings growth could be hurt by probable prolonged declines in commodity prices.

SAN FRANCISCO (AP) — Shares of Micron Technology Inc. jumped more than 10 percent Wednesday amid mounting speculation it could score a cash infusion under a possible government-brokered deal with Taiwan's ailing memory chip makers.

NEW YORK (AP) — Shares of Dick's Sporting Goods Inc. rose modestly Wednesday afternoon after the sporting goods retailer reported adjusted fourth-quarter profit above Wall Street expectations and analysts remained upbeat.