NEW YORK (AP) -- Stocks that moved substantially or traded heavily in Tuesday's shortened session on the New York Stock Exchange and Nasdaq Stock Market:
General Motors Co., up $1.10 at $20.67
The automaker's U.S. sales rose 16 percent in June, helped by strong demand for the Chevy Malibu and Volt electric car.
Duke Energy Corp., down $1.15 at $68.69
As a $32 billion deal with Progress Energy closed, Duke's CEO was unexpectedly named head of the combined electric company.
Corporate Executive Board Co., up $4.47 at $46.11
The business research firm said the purchase of HR services company SHL for $660 million will significantly increase its customer base.
Christopher & Banks Corp., up 23 cents at $1.39
Major shareholder Aria Partners, an investment firm, urged the women's clothing retailer to consider is $64.2 million buyout offer.
Verso Paper Corp., up 56 cents at $1.73
The paper maker is talking with NewPage Corp. noteholders about a possible bid for the company, which is in bankruptcy protection.
OraSure Technologies Inc., up 60 cents at $12.10
The FDA approved the company's over-the-counter HIV test, the first such diagnostic test for home use of the virus that causes AIDS.
MModal Inc., up $1.09 at $14.02
An investment arm of New York bank JP Morgan Chase & Co. is buying the medical transcription services company for $1.1 billion.
Chelsea Therapeutics International Ltd., down 59 cents at 86 cents
Regulators recommended another trial for its Parkinson's treatment Northera, delaying approval of its most advanced drug candidate.