The top aftermarket NYSE Losers Tuesday were: Fusion-io, Rock-Tenn, Quest Diagnostics, Cemex SAB, Williams Partners, Petrobras Argentina, Williams-Sonoma, Norfolk Souther and Advanced Micro Devices.

Fusion-io, Inc. (NYSE:FIO) shares slumped 13.41 percent to $26.27 in aftermarket trading session. Its fourth quarter net loss widened to $5.71 million or $0.07 per share from $2.47 million or $0.19 per shares in the same quarter last year.

Rock-Tenn Co. (NYSE:RKT) shares slumped 10.86 percent to $59.90 in aftermarket trading session as its first quarter earnings fell short of expectations. The company reported first quarter adjusted earnings per share of $1.18 compared to $1.28 in the same period last year and against analysts’ expectation of $1.39 per share.

Quest Diagnostics Inc. (NYSE:DGX) shares declined plunged 6.97 percent to $56.50 in post market trading session. The company stock surged more than 7 percent in regular trading session after reporting fourth quarter earnings. Net income rose to $189.5 million or $1.19 per share from $165.7 million or $0.96 per share in the same quarter last year.

Cemex SAB de CV (NYSE:CX) shares declined 4.07 percent to $6.13 in aftermarket trading session. The stock has a 52-week low of $2.27, a 52-week high of $10.26 and $6.38 billion in market capitalization.

Williams Partners L.P. (NYSE:WPZ) shares decline d3.38 percent to $62.65 in post market trading session. WPZ announce on Tuesday that it intends to commence an underwritten public offering of 6,500,000 common units representing limited-partner interests.

Petrobras Argentina SA (NYSE:PZE) shares declined 3.22 percent to $16.57 in post market trading session. The company stock climbed more than 10 percent in regular trading session.

Williams-Sonoma, Inc. (NYSE:WSM) shares declined 2.75 percent to $34.00 in post market trading session.

Norfolk Souther Corp. (NYSE:NSC) shares declined 2.62 percent to $73.50 in post market trading session as its fourth quarter revenue fell short of expectations. Revenue rose 17 percent to $2.80 billion from $2.39 billion in the same quarter last year, while analysts’ expected the company to report revenue of $2.84 billion for the fourth quarter.

Advanced Micro Devices, Inc. (NYSE:AMD) shares declined 2.91 percent to $6.34 in post market trading session. The company swung to fourth quarter net loss of $177 million or $0.24 per share compared to net income of $375 million or $0.50 per share in the same quarter last year.

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