Top NASDAQ Volume Leaders - #GRPN, SIRI, FB, CSCO,#MSFT, PPHM, EROC, MU, YHOO, AAPL, RIMM

Groupon (NASDAQ: GRPN) is trading down 22.52% and was last sold at $5.85. The stock traded as high as $6.00 and as low as $5.76. GRPN had previously closed at $7.55. 16,354,560 shares of the stock traded hands today.

Sirius XM Radio Inc. (NASDAQ: SIRI) is trading down 1.20% and was last sold at $2.48. The stock traded as high as $2.53 and as low as $2.48. SIRI had previously closed at $2.51. 8,963,640 shares of the stock traded hands today.

Facebook (NASDAQ: FB) is trading down 3.47% and was last sold at $20.85. The stock traded as high as $21.60 and as low as $20.82. FB had previously closed at $21.60. 6,874,795 shares of the stock traded hands today.

Cisco Systems, Inc. (NASDAQ: CSCO) is trading down 0.40% and was last sold at $17.27. The stock traded as high as $17.40 and as low as $17.17. CSCO had previously closed at $17.34. 4,776,602 shares of the stock traded hands today.

Microsoft Corp (NASDAQ: MSFT) is trading down 0.66% and was last sold at $30.19. The stock traded as high as $30.39 and as low as $30.17. MSFT had previously closed at $30.39. 3,833,379 shares of the stock traded hands today.

Peregrine Pharmaceuticals Inc (NASDAQ: PPHM) is trading down 6.99% and was last sold at $2.66. The stock traded as high as $3.21 and as low as $2.62. PPHM had previously closed at $2.86. 3,427,076 shares of the stock traded hands today.

Eagle Rock Energy Partners (NASDAQ: EROC) is trading up 1.26% and was last sold at $8.83. The stock traded as high as $8.85 and as low as $8.70. EROC had previously closed at $8.72. 2,640,598 shares of the stock traded hands today.

Micron Technology, Inc. (NASDAQ: MU) is trading down 0.30% and was last sold at $6.70. The stock traded as high as $6.78 and as low as $6.68. MU had previously closed at $6.72. 2,512,097 shares of the stock traded hands today.

Yahoo! Inc. (NASDAQ: YHOO) is trading down 0.47% and was last sold at $14.95. The stock traded as high as $15.05 and as low as $14.84. YHOO had previously closed at $15.02. 2,443,258 shares of the stock traded hands today.

Apple, Inc (NASDAQ: AAPL) is trading up 0.60% and was last sold at $633.81. The stock traded as high as $635.30 and as low as $631.85. AAPL had previously closed at $630.00. 2,228,732 shares of the stock traded hands today.

Research In Motion (NASDAQ: RIMM) is trading down 2.23% and was last sold at $7.89. The stock traded as high as $8.09 and as low as $7.88. RIMM had previously closed at $8.07. 2,093,223 shares of the stock traded hands today.

Intel (NASDAQ: INTC) is trading up 0.19% and was last sold at $26.74. The stock traded as high as $26.81 and as low as $26.63. INTC had previously closed at $26.69. 2,024,784 shares of the stock traded hands today.

Zynga Inc. (NASDAQ: ZNGA) is trading flat unch and was last sold at $2.93. The stock traded as high as $2.95 and as low as $2.91. ZNGA had previously closed at $2.93. 1,955,031 shares of the stock traded hands today.

Velti (NASDAQ: VELT) is trading up 11.65% and was last sold at $7.86. The stock traded as high as $8.61 and as low as $7.70. VELT had previously closed at $7.04. 1,924,318 shares of the stock traded hands today.

eBay, Inc. (NASDAQ: EBAY) is trading up 0.60% and was last sold at $45.59. The stock traded as high as $45.87 and as low as $45.30. EBAY had previously closed at $45.32. 1,875,727 shares of the stock traded hands today.

Frontier Communications (NASDAQ: FTR) is trading down 2.49% and was last sold at $4.70. The stock traded as high as $4.88 and as low as $4.68. FTR had previously closed at $4.82. 1,737,377 shares of the stock traded hands today.

NVIDIA (NASDAQ: NVDA) is trading down 0.20% and was last sold at $14.78. The stock traded as high as $14.88 and as low as $14.71. NVDA had previously closed at $14.81. 1,713,731 shares of the stock traded hands today.

Arena Pharmaceuticals, Inc. (NASDAQ: ARNA) is trading up 0.41% and was last sold at $7.27. The stock traded as high as $7.35 and as low as $7.27. ARNA had previously closed at $7.24. 1,701,294 shares of the stock traded hands today.

Oracle (NASDAQ: ORCL) is trading up 0.61% and was last sold at $31.55. The stock traded as high as $31.59 and as low as $31.30. ORCL had previously closed at $31.36. 1,475,273 shares of the stock traded hands today.

Comcast Co. (NASDAQ: CMCSA) is trading up 0.67% and was last sold at $34.78. The stock traded as high as $34.88 and as low as $34.62. CMCSA had previously closed at $34.55. 1,388,071 shares of the stock traded hands today.