The top aftermarket NYSE losers on Wednesday were: Qihoo 360 Technology, Safeway, Chevron, Camden Property Trust, Genworth Financial, Tyson Foods, Mueller Water Products, Watson Pharmaceuticals and HollyFrontier Corp.

Qihoo 360 Technology Co. Ltd. (NYSE:QIHU) shares plunged 4.47 percent to $16.12 in aftermarket trading sessions. The company stock climbed more than 7 percent in regular trading sessions.

Safeway Inc. (NYSE:SWY) shares declined 3.27 percent to $20.70 in aftermarket trading sessions. The stock has a 52-week low of $15.93, a 52-week high of $25.43 and $7.07 billion in market capitalization.

Chevron Corp. (NYSE:CVX) shares declined 3.08 percent to $105.70 in aftermarket trading sessions. On Wednesday, the company reported in its interim update that earnings for the fourth quarter 2011 are expected to be significantly below third quarter 2011 results.

Camden Property Trust (NYSE:CPT) shares declined 2.78 percent to $59.50 in post -market trading sessions. CPT announced on Wednesday that it has exercised its option to purchase the 80% interest not currently owned by the Company in 12 joint ventures.

Genworth Financial Inc. (NYSE:GNW) shares declined 2.72 percent to $7.59 in aftermarket trading sessions. The company stock surged more than 7 percent in regular trading sessions.

Tyson Foods, Inc. (NYSE:TSN) shares declined 2.51 percent to $19.82 in aftermarket trading sessions.

Mueller Water Products, Inc. (NYSE:MWA) shares declined 2.09 percent to $2.73 in aftermarket trading sessions. The stock has a 52-week low of $1.94, a 52-week high of $4.80 and $434.69 million in market capitalization.

Watson Pharmaceuticals, Inc. (NYSE:WPI) shares declined 2.04 percent to $63.26 in aftermarket trading sessions.

HollyFrontier Corp. (NYSE:HFC) shares declined 2.01 percent to $25.90 in post-market trading sessions. The stock has a 52-week low of $20.07, a 52-week high of $38.90 and $5.53 billion in market capitalization.

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