BlackBerry - Research In Motion's new name and ticker symbol ("BBRY") become official at the Nasdaq Stock Market this morning, although formal approval won't come until the smartphone maker's annual meeting this summer. The stock has also been upgraded to "outperform" from "market perform" at Bernstein, on enthusiasm about the debut of BlackBerry 10.
Wal-Mart Stores - The retailer's stock has been downgraded to "neutral" from "overweight" at JPMorgan Chase, which said the core predictions behind a November upgrade have now occurred, with the stock facing a tougher road going forward.
Humana - The health insurer reported quarterly profit of $1.19 per share, 13 cents above estimates, though revenue came in short of consensus. Humana was able to keep control of rising costs, and it also backed its November outlook for 2013 of $7.60 to $7.80 per share.
Dell - Buyout talks reportedly continued over the weekend, and a deal is seen coming within days. As has been reported previously, the buyers would be CEO Michael Dell, private-equity firm Silver Lake Partners, and software giant Microsoft.
McDonald's - The restaurant chain is introducing its first new children's Happy Meal in a decade. It will offer a Fish McBites version starting this week.
Google - Google shares have been downgraded to "market perform" from "outperform" at BMO Capital Markets, noting that Google's 39 percent advance since mid-June makes it less appealing for value investors.
Herbalife - The New York Post reports that Herbalife is being investigated by law enforcement officials after a Freedom of Information Act request revealed 192 complaints against the company in the past seven years.
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CarMax - CarMax has approved a $500 million extension of its existing share buyback program. The auto retailer had previously approved a $300 million program on Oct. 17, and the new extension will last until Dec. 31, 2014.
Wet Seal - Wet Seal said President and Chief Operating Officer Ken Seipel has resigned, and that it plans to eliminate the COO position going forward. The specialty retailer is also cutting 35 jobs and implementing a $25 million share repurchase program.
Yahoo - Third Point is selling 11 million of its Yahoo shares. Its remaining stake amounts to 62 million shares. Third Point said its move is motivated by its goal of maintaining a roughly consistent percentage of Yahoo's outstanding shares as the company buys back stock.
Barclays - Barclays chief financial officer, Chris Lucas, is retiring, along with the scandal-ridden bank's chief legal expert, Mark Harding. Both will stay in those jobs until successors are found.
Blackrock - Blackrock is the target of a lawsuit from two pension funds, which allege that the asset manager "looted" securities-lending revenues from investors in its iShares exchange-traded funds. Blackrock said the suit is without merit and that it will contest the charges "vigorously."