Stocks Showing Unusually Heavy Volume - Sirius Satellite Radio, Intuitive Surgical Inc, ValueClick Inc, Sierra Wireless Inc

Here are the results for today's unusual stock volume scan. The scan looks at the previous day's volume and compares it to the recent average volume. It then sorts the stocks based on those that showed the biggest increase (the "unusual" part) in volume.

Companies included in today's scan are: Cardica, Inc. (CRDC), Costco Wholesale (COST), Comverse Technology (CMVT), ADC Telecommunications (ADCT), Cerner Corp. (CERN), Zimmer (ZMH), Arrow Electronics (ARW), XM Satellite Radio (XMSR), Sierra Wireless (SWIR), Convergys (CVG), NII Holdings Inc (NIHD), Intuitive Surgical (ISRG), JetBlue Airways (JBLU), FormFactor (FORM), JAKKS Pacific (JAKK), Panera Bread (PNRA), Dendreon (DNDN), AirTran (AAI), Mentor Corp. (MNT), Plantronics (PLT), VMware, Inc. (VMW), EMC Corp. (EMC), ValueClick Inc (VCLK), General Dynamics (GD), Sirius Satellite Radio (SIRI).

These are the top stocks from today's scan, which has some basic filters to eliminate penny stocks and those that don't trade frequently. A description of the column headings is below.

• Move Previous Day - yesterday's percent return.
• Volume Increase - looks at the previous day's volume and compares it to the recent average volume. It then sorts the stocks based on those that showed the biggest increase (the "unusual" part) in volume.
• Close - yesterday's closing price.
• Total Ratings - number of analysts who track the stock, according to Zacks.
• Buy Percent - percent of the analysts who rate the stock as a "buy". I use this to help gauge sentiment and potential buying demand. If everyone already loves a stock, that means a steady stream of new money will need to enter the stock to fuel a rally.

Note - sentiment data is current as of the previous trading day...

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