Stocks that moved substantially or traded heavily Wednesday on the New York Stock Exchange and Nasdaq Stock Market:
Alpha Natural Resources Inc., down $4.62 at $22.30
The coal producer said it will ship less coal than estimated as demand in Asia fell and production at some of its mines dropped.
Walter Energy Inc., down $8.75 at $66.25
The company, which produces coal for the steel industry, cut its expectations for coal production in the second half of the year.
General Mills Inc., up 95 cents at $38.44
The food company, which makes Cheerios cereal, said its first-quarter profit fell but its adjusted results topped analyst estimates.
Bank of America Corp., down 52 cents at $6.38
Moody's lowered the bank's debt rating saying it is less likely that the U.S. government would support the lender from failing.
Hewlett-Packard Co., up $1.51 at $23.98
Citing two unnamed sources, Bloomberg reported that the technology company's board is considering removing CEO Leo Apotheker.
Oracle Corp., up $1.19 at $29.54
The software company reported quarterly results that slightly exceeded what Wall Street had been expecting.
Orexigen Therapeutics Inc., up 72 cents at $2.19
The biopharmaceutical company said it received federal approval to revive its previously abandoned weight loss drug Contrave.
NuVasive Inc., down $2.56 at $18.65
A federal jury ruled that the medical device maker must pay rival Medtronic $101 million in damages for infringing on its patents.