The top after-market NASDAQ losers Monday were: VIVUS, Harmonic, Shutterfly, Finish Line, Ocean Rig UDW, Power-One, Associated Banc, Schnitzer Steel Industries, Vertex Pharmaceuticals and China Real Estate Information Corp.

VIVUS Inc. (VVUS) stock slumped 8.46 percent to $20.98 in aftermarket session. The company announced that the US Food and Drug Administration has extended their deadline by three months making an approval decision on its obesity drug Qnexa.

Harmonic Inc. (HLIT) stock plunged 4.03 percent to $4.76 in post market trading after announcing its first quarter preliminary results. The company currently expects first quarter revenue to be in a range of $125 to $128 million, down from prior estimation of $132 to $142 million range.

Shutterfly Inc. (SFLY) stock plunged 3.47 percent to $27.23 in aftermarket session. The company stock plunged more than 4 percent in regular session after Facebook agreed to buy the Instagram photo-sharing application for about $1 billion.

Finish Line Inc. (FINL) stock advanced 3.14 percent to $21.01 in aftermarket session. The stock has a 52-week low of $16.42, a 52-week high of $26.16 and $1.13 billion in market capitalization.

Ocean Rig UDW Inc. (ORIG) stock advanced 3.12 percent to $16.45 in post market session. The company announced that DryShips Inc. is offering to sell 9,000,000 Ocean Rig common shares in an underwritten public offering pursuant to Ocean Rig's registration statement on Form F-1 filed with the Securities and Exchange Commission.

Power-One Inc. (PWER) stock fell 2.17 percent to $4.05 in post market session.

Associated Banc Corp. (ASBC) stock declined 2.03 percent to $13.00 in post market session. The stock has a 52-week low of $8.74, a 52-week high of $15.04 and $2.31 billion in market capitalization.

Schnitzer Steel Industries Inc. (SCHN) stock declined 1.89 percent to $39.46 in aftermarket session. The company stock advanced 2 percent in regular session.

Vertex Pharmaceuticals Inc. (VRTX) stock fell 1.57 percent to $37.51 in post market session. The company announced that it will release its first quarter 2012 financial results on Thursday, April 26, 2012.

China Real Estate Information Corp. (CRIC) stock declined 1.5 percent to $5.25 in aftermarket session.

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