The top aftermarket NYSE losers Tuesday were: Medicis Pharmaceutical, Beazer Homes USA, Service Corporation International, GenOn Energy, WPX Energy, CapitalSource, K12 and W.R. Berkley Corp.

Medicis Pharmaceutical Corp. (NYSE:MRX) shares slumped 8.92 percent to $30.75 in post market trading session after lowering fourth quarter earnings outlook.

For the fourth quarter, the company currently expects adjusted earnings to be in a range of $0.51 to $0.57 per share on revenues of $170 to $183 million compared to its earlier estimation of $0.63 to $0.69 per share on revenues of $187 to $200 million, while analysts were expecting the Company to report revenue of $190 million and earnings per share of $0.64.

Beazer Homes USA, Inc. (NYSE:BZH) shares plunged 5.02 percent to $2.27 in post market trading session. The stock has a 52-week low of $1.35, a 52-week high of $6.23 and $180.56 million in market capitalization.

Service Corporation International (NYSE:SCI) shares declined 2.31 percent to $10.58 in aftermarket trading session.

GenOn Energy, Inc. (NYSE:GEN) shares declined 2.3 percent to $2.64 in post market trading session. The company stock surged more than 3 percent in regular trading session.

WPX Energy, Inc. (NYSE:WPX*) shares declined 2.24 percent to $18.075 in post market trading session.

CapitalSource Inc. (NYSE:CSE) shares declined 1.96 percent to $6.51 in aftermarket trading session. The stock has a 52-week low of $5.08, a 52-week high of $8.21 and $1.82 billion in market capitalization.

K12 Inc. (NYSE:LRN) shares declined 1.59 percent to $17.29 in post market trading session. The company stock surged nearly 4 percent in regular trading session.

W.R. Berkley Corp. (NYSE:WRB) shares declined 1.5 percent to $34.11 in aftermarket trading session.

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