The top aftermarket NYSE gainers Wednesday were: Cinemark Holdings, Constellation Brands, E-Commerce China Dangdang, National Bank of Greece, Sprint Nextel Corp and Aviva plc. The top aftermarket NYSE losers were: Ruby Tuesday, McClatchy, CTS Corp, Standard Pacific Corp, InvenSense and MGIC Investment.

Gainers

Cinemark Holdings Inc. (CNK) shares surged 3.91 percent to $22.85 in aftermarket session. The company will replace NSTAR (NST) in the S&P MidCap 400 index after the close of trading Monday, April 9. Analysts'' at Wedbush raised price target on shares of CNK to $24.00 from $22.00.

Constellation Brands Inc. (STZ) shares surged 3.28 percent to $25.50 in post market session. The company is expected to report fourth quarter net profit of $0.38 per share before the opening bell Thursday.

E-Commerce China Dangdang Inc. (DANG) shares advanced 2.6 percent to $9.46 in post market trading. The company stock climbed more than 6 percent in regular trading session.

National Bank of Greece SA (NBG) shares advanced 1.9 percent to $2.15 in aftermarket session. The company stock slumped more than 10 percent in regular trading session.

Sprint Nextel Corp. (S) shares gained 1.82 percent to $2.80 in aftermarket session. The company announced that it will release its financial results for the first quarter 2012 on Wednesday, April 25.

Aviva plc (AV) shares gained 1.69 percent to $10.23 in post market trading. The stock has a 52-week low of $8.34, a 52-week high of $15.28 and $15.24 billion in market capitalization.

Losers

Ruby Tuesday, Inc. (RT) shares slumped 12.05 percent to $7.81 in aftermarket session. Its third quarter net profit plunged to $4.5 million or $0.07 per share from $16 million or $0.25 per share in the same period a year-earlier. Revenue rose to $324.8 million from $319 million last year but fell short of analysts'' estimation of $339.03 million.

For the fiscal 2012, the company currently expects adjusted earnings to be in a range of $0.43 to $0.48 per share, down from its prior estimation of $0.55 to $0.65 per share, while analysts' expect net profit of $0.56 per share.

McClatchy Co. (MNI) shares plunged 3.96 percent to a $2.67 in aftermarket session.

CTS Corp. (CTS) shares fell 2.21 percent to $10.12 in aftermarket session.

Standard Pacific Corp. (SPF) declined 1.97 percent to $4.36 in post market session. The will release its 2012 first quarter results after the market close of the NYSE on Monday, April 30, 2012.

InvenSense, Inc. (INVN) shares declined 1.66 percent to $16.77 in post market trading after plunging more than 4 percent in regular trade. The stock has a 52-week low of $8.25, a 52-week high of $22.35 and $1.37 billion in market capitalization.

MGIC Investment Corp. (MTG) shares fell 1.62 percent to $4.94 in aftermarket session.

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