Bank of America Corporation (NYSE:BAC) is down 3.02% today at $7.09. BAC is down on low volume today with 190 million shares traded, the stock usually trades 270 million shares a day. BAC shares fell today along with the overall market because of EU concerns. The company has a market cap of 74.59 billion. Check out one of the best swing traders on the street.

Sirius XM Radio Inc. (NASDAQ:SIRI) is down 0.74% in afternoon trading at $2.02. SIRI has traded 65 million shares so far today, 10 million shares more than its daily average. SIRI shares have fallen about $0.15 over the past few days. The company has a market cap of 7.61 billion.

Research In Motion Limited (NASDAQ:RIMM) is up 1.52% today at $17.06. RIMM has traded 24 million shares today and trades 24.3 million shares a day on average. RIMM shares have jumped more than $2 a share over the past week after falling about the same earlier this month. The company has a market cap of 8.80 billion.

Micron Technology, Inc. (NASDAQ:MU) is up 1.82% today at $7.57. MU has traded 18.5 million shares so far today and trades 31.6 million shares a day on average. MU shares are bouncing back today after seeing a slight pull back last week. The company has a market cap of 7.45 billion. Check out one of the best swing traders on the street.

Arena Pharmaceuticals, Inc. (NASDAQ:ARNA) is up 9.44% this afternoon at $1.74. ARNA has traded 11.8 million shares so far today, 5 times its daily average. The company has a market cap of 253.92 million.

Zynga Inc. (NASDAQ:ZNGA) is up 2.29% today at $10.29. ZNGA has traded 11.4 million shares so far today, above its daily average of 10.2 million shares. ZNGA shares have jumped $2 this month. ZNGA shares could be moving up as reports that Facebook will be filing for an IPO soon. The company has a market cap of 7.22 billion.