The top after-market NYSE gainers Tuesday were Christopher & Banks, Chicago Bridge & Iron, AU Optronics Corp, Starwood Property Trust and TransCanada Corp. The top after-market NYSE losers were Carpenter Technology, Cobalt International Energy, Stag Industrial, Mindray Medical and Imperial Holdings.

Gainers

Christopher & Banks Corp. (NYSE:CBK) shares climbed 8.47 percent to $6.15 in post-market trading. The company currently expects to report a comparable store sales increase in the high teens for the fourth fiscal quarter as compared to the company’s previous guidance of a comparable store sales increase in the high single to low double digits.

Chicago Bridge & Iron Co N.V. (NYSE:CBI) shares surged 3.65 percent to $49.96 in post-market trading. The stock has a 52-week low of $32.48, a 52-week high of $48.34 and $4.67 billion in market capitalization.

AU Optronics Corp. (NYSE:AUO) shares advanced 2.84 percent to $4.22 in post-market trading. The company stock plunged more than 3 percent in regular trading.

Starwood Property Trust, Inc. (NYSE:STWD) shares gained 2.68 percent to $24.49 in post-market trading. The stock has a 52-week low of $18.77, a 52-week high of $24.56 and $3.23 billion in market capitalization.

TransCanada Corp. (NYSE:TRP) shares rose 2.41 percent to $50.50 in post-market trading. The stock has a 52-week low of $39.74, a 52-week high of $49.50 and $34.76 billion in market capitalization.

Losers

Carpenter Technology Corp. (NYSE:CRS) shares plunged 5.97 percent to $50.70 in post-market trading. The company currently expects the second quarter earnings to be in a range of $0.61 to $0.62 per share, 20 percent higher compared to same period last year but below the $0.74 per diluted share reported in the first quarter of fiscal year 2013 and also fell short of Reuters’ estimate of $0.77 per share for the second quarter.

Cobalt International Energy Inc. (NYSE:CIE) shares slumped 5.61 percent to $25.25 in post-market trading. The company announced Tuesday that it had commenced a registered underwritten public offering of 40,000,000 shares of its common stock, all of which would be offered by selling stockholders.

Stag Industrial, Inc. (NYSE:STAG) shares declined 2.39 percent to $18.40 in post-market trading. The company Tuesday announced the commencement of an underwritten public offering of 5,000,000 shares of its common stock.

Mindray Medical International Ltd. (NYSE:MR) shares fell 2.23 percent to $34.14 in post-market trading. The stock has a 52-week low of $26.17, a 52-week high of $36.36 and $4.02 billion in market capitalization.

Imperial Holdings, Inc. (NYSE:IFT) shares declined 2.20 percent to $4.00 in post-market trading. Its third quarter net loss widened to $1.48 per share from $0.59 per share in the same period last year.

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