Heavy Volume for Sirius, Micron and RIM (NASDAQ:SIRI),(NASDAQ:MU),(NASDAQ:RIMM)

The NASDAQ took a beating compared to other indices as shares of Sirius XM Radio Inc. (NASDAQ:SIRI), Micron Technology, Inc. (NASDAQ:MU) and Research In Motion Limited (USA) (NASDAQ:RIMM) shed some financial weight.  Still, the NASDAQ eked out a gain.

Sirius XM Radio Inc. (NASDAQ:SIRI) lost 3.5% to $0.84 a share on 2X average daily volume (226M shares vs 113M shares avg).  Concerns of delisting seem to be fueling ongoing volume for the stock.

Micron Technology, Inc. (NASDAQ:MU) had a modest drop for the last trading day of the week, losing 1.93% to close at $10.17.  Very heavy volume showed up as 128M shares traded versus 32M average, making for 4X average daily volume as Micron posts upbeat quarterly results but still close down for the day.

Research In Motion Limited (USA) (NASDAQ:RIMM) shares plummeted Thursday on very heavy volume, over 3X average daily.  Shares closed at $68.48 after dropping 7.42% on worries about financial results.