The top aftermarket NYSE losers on Tuesday were: HyperDynamics Corp, Precision Drilling Corp, NYSE Euronext, Gold Fields Ltd, SK Telecom Corp, Express, Pacific Drilling, Peabody Energy Corp and Federal Signal Corp.

HyperDynamics Corp. (NYSE:HDY) shares plunged 4.39 percent to $3.27 in post market trading session. The stock has a 52-week low of $2.78, a 52-week high of $7.78 and $535.04 million in market capitalization.

Precision Drilling Corp. (NYSE:PDS) shares declined 3.95 percent to $10.70 in aftermarket trading session.

NYSE Euronext, Inc. (NYSE:NYX) shares declined 3.1 percent to $27.50 in aftermarket trading session.

Gold Fields Ltd. (NYSE:GFI) shares declined 2.7 percent to $16.51 in aftermarket trading session. The stock has a 52-week low of $13.62, a 52-week high of $18.70 and $12.27 billion in market capitalization.

SK Telecom Corp, Ltd. (NYSE:SKM) shares declined 2.69 percent to $14.09 in aftermarket trading session. The company’s chairman was called back for questioning by prosecutors on suspicion that he embezzled nearly US $88 million of group funds in collusion with his younger brother.

Express, Inc. (NYSE:EXPR) shares declined 2.48 percent to $21.25 in aftermarket trading session. The apparel retailer announced that certain stockholders intend to sell 16,000,000 shares of its common stock in an underwritten offering.

Pacific Drilling S.A. (NYSE:PACD) shares declined 1.76 percent to $8.488 in aftermarket trading session.

Peabody Energy Corp. (NYSE:BTU) shares declined 1.28 percent to $37.75 in post market trading session. The company announced that it has named Allen T. Capdeboscq as Vice President of Financial and Capital Planning and Amy B. Schwetz as Vice President of Investor Relations.

Federal Signal Corp. (NYSE:FSS) shares declined 1.66 percent to $4.07 in aftermarket trading session. The company stock was downgraded to “neutral” rating from “buy” rating at KeyBanc.

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