Profit taking sank shares of FriendFinder Networks Inc. (Nasdaq: FFN) whose stock price soared yesterday ahead of Facebook's (Nasdaq: FB) market debut. FriendFinder Networks stock dropped 28 cents to close at $1.43 while Facebook stock edged up 23 cents to close at $38.23

Online social games company Zynga (Nasdaq: ZNGA) tumbled $1.11 to close at $7.16 after Facebook Inc.'s (Nasdaq: FB) disappointing market debut. Shares of Facebook edged up 23 cents to close at $38.23.

Rising natural gas prices lifted shares of Chesapeake Energy Corp. (NYSE: CHK) 81 cents to close at $14.36.

Facebook Inc. (Nasdaq: FB) opened above its IPO price of $38 and reached a high of $45 before slipping down to $40.27 at midday.

Autodesk Inc. (Nasdaq: ADSK) reported higher first quarter revenue and earnings of 34 cents per share compared with 29 cents per share a year earlier but warned that second revenue will fall short of analyst expectations sending the stock price plummeting $4.79 to $29.94.

CLSA Asia-Pacific Markets upgraded Salesforce.com Inc. (NYSE: CRM) to a Buy rating and lifted its price target to $180 from $160. The stock price leaped $12.33 to $146.13.

GameStop Corp. (NYSE: GME) disappointed with lower first quarter revenue and earnings of 54 cents per share compared with 56 cents per share last year and forecast second quarter income well below expectations. The stock price plunged $2.32 to close at $18.52.

GT Advanced Technologies Inc. (Nasdaq: GTAT) reported higher fourth quarter revenue and earnings of 65 cents per share compared with 41 cents per share a year earlier but the results fell short of expectations sending the stock price down 83 cents to close at $4.49.

Profit taking sank shares of Herbalife Ltd. (NYSE: HLF) $4.93 to close at $44.58. The stock priced spiked yesterday after Greenlight Capital's David Einhorn did not recommend shorting the stock, a move that had been anticipated by investors.

Shares of MEMC Electronic Materials Inc. (NYSE: WFR) continued falling by losing 37 cents to $1.76 after announcing the immediate resignation of chief financial officer Mark Murphy yesterday.

Wal-Mart Stores Inc. (NYSE: WMT) reported higher first quarter earnings of $1.09 per share compared with 97 cents per share in the year ago period that topped analyst estimates as revenue rose. Shares of the discount retailer soared $3.03 to $62.22.

The Securities and Exchange Commission has opened an investigation into Dendreon Corp. (Nasdaq: DNDN) sending the stock price down 92 cents to $7.70.

Shares of Renren Inc. (NYSE: RENN) continued rising by gaining 41 cents to close at $6.25 after reporting better than expected first quarter results after market close on Monday. 

Relieved investors snapped up shares of Herbalife Ltd. (NYSE: HLF) after Greenlight Capital's David Einhorn made no mention of shorting the stock at the Ira Sohn conference. Shares of the nutritional supplement company leaped $7.07 to close at $49.51.

Velti (Nasdaq: VELT) narrowed first quarter losses more than expected to 14 cents per share from 34 cents per share in the year ago period as revenue surged but the company's cash balance tumbled and may continue falling. The stock price plummeted $2.88 to close at $5.72.