The top after-market NYSE gainers Thursday were CenterPoint Energy, Discover Financial Services, Bank of America, Transamerica Income Shares and McEwen Mining. The top after-market NYSE losers were Callon Petroleum, Niska Gas Storage Partners, Krispy Kreme Doughnuts, Aeropostale Inc and NYSE Euronext.

Gainers

CenterPoint Energy, Inc. (NYSE:CNP) shares surged 4.08 percent to $22.73 in post-market trading. CenterPoint, OGE Energy Corp. and ArcLight announced Thursday that they have entered into an agreement to form a master limited partnership that will include CenterPoint Energy's interstate pipelines and field services businesses and the midstream business of Enogex LLC, owned jointly by subsidiaries of OGE and ArcLight.

A bicyclist rides past a Bank of America in Tucson
A bicyclist rides past a Bank of America in Tucson, Arizona January 21, 2011. Photo: REUTERS

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Discover Financial Services (NYSE:DFS) shares surged 3.15 percent to $44.20 in post-market trading. The company announced that its board of directors has approved a new share repurchase program authorizing the company to repurchase up to $2.4 billion of its common stock, and that it plans to increase its quarterly common stock dividend

Bank of America Corp. (NYSE:BAC) shares surged 3.06 percent to $12.48 in post-market trading. The second largest U.S. bank announced Thursday that its Board of Directors authorized the repurchase of up to $5 billion of common stock and the redemption of approximately $5.5 billion in preferred stock.

Transamerica Income Shares, Inc. (NYSE:TAI) shares gained 3.03 percent to $21.74 in post-market trading. The company stock plunged nearly 5 percent in regular trading.

McEwen Mining Inc. (NYSE:MUX) shares advanced 2.21 percent to $2.78 in post-market trading. The stock has a 52-week low of $1.96, a 52-week high of $4.94 and $730.33 million in market capitalization.

Losers

Callon Petroleum Co. (NYSE:CPE) shares slumped 7 percent to $4.65 in post-market trading. The stock has a 52-week low of $3.80, a 52-week high of $7.46 and $199 million in market capitalization.

Niska Gas Storage Partners LLC (NYSE:NKA) shares plunged 6.08 percent to $11.90 in post-market trading. The stock has a 52-week low of $9.19, a 52-week high of $14.09 and $865.32 million in market capitalization.

Krispy Kreme Doughnuts, Inc. (NYSE:KKD) shares plunged 5.42 percent to $14.14 in post-market trading. Its fourth quarter adjusted net profit rose to $7.4 million or $0.11 per share from $4 million or $0.06 per share in the same period last year but fell short of Reuters' estimate of $0.12 per share. Currently, the company expects fiscal 2014 net profit to be in a range of $0.53 to $0.57 per share, up from its prior estimation of $0.49 to $0.55 per share, slightly below analysts’ estimate of $0.58 per share.

Aeropostale Inc. (NYSE:ARO) shares plunged 4.89 percent to $13.80 in post-market trading. The company posted fourth quarter net loss of $0.7 million or $0.01 per share compared to net profit of $26.1 million or $0.32 per share in the same quarter last year.

NYSE Euronext, Inc. (NYSE:NYX) shares declined 3.23 percent to $37.11 in post-market trading. The stock has a 52-week low of $22.25, a 52-week high of $38.53 and $9.28 billion in market capitalization.