The market continues to trade mixed in midday trading. A positive jobs report sent stocks slightly higher this morning, but soon retreated after mixed earnings and Ben Bernanke’s remarks. Ben Bernanke told law makers earlier today that the economic recovery is “frustratingly slow.” He also urged law makers not to cut spending in policies that could help strengthen the economy. The Dow is down 18 points, the Nasdaq is up 7 points and the S&P is up 1 point.

Zynga Inc. (NASDAQ:ZNGA) is up 15.19% today at $12.21. ZNGA is continuing its rally over the past week or so as Facebook’s IPO filing is sending numerous companies in that sector up. Zynga’s success is directly tied into Facebook’s success. ZNGA is up on extremely large volume with nearly 40 million shares traded. The stock trades 10 million shares a day on average. The company has a market cap of 8.50 billion.

Cemex, S.A.B. (NYSE:CX) is up 6.75% in midday trading at $7.58. CX has traded 31.8 million shares so far today, more than double its daily average. CX shares are up today after the company announced fourth quarter results. CX saw consolidated net sales increase by 6% in the fourth quarter to $3.7 billion and increased 8 for the full year. The company has a market cap of 7.93 billion.

Sandridge Energy Inc. (NYSE:SD) is down 10.22% today at $7.03. SD has traded 50.1 million shares today, five times its daily average. SD was downgraded today by multiple analysts. Tudor Picering downgraded the stock to hold from accumulate and Howard Weil downgraded to market perform from market outperform. Sandridge also announced the purchase of Dynamic Offshore for $1.27 billion yesterday. The company has a market cap of 2.82 billion.

Green Mountain Coffee Roasters, Inc. (NASDAQ:GMCR) is up 22.02% in midday trading at $65.44. GMCR is rallying today after crushing analysts’ estimates for first quarter results. Revenue more than doubled to $1.16 billion and net income rose to $104 million. First quarter adjusted EPS was $0.60 compared to the consensus of $0.36. GMCR has traded 18.2 million shares so far today, well above its daily average of 7.2 million shares. The company has a market cap of 10.12 billion.

Dynavax Technologies Corporation (NASDAQ:DVAX) is up 8.91% today at $4.01. DVAX has traded 7.3 million shares today, more than 5 times its daily average. DVAX shares are up today after it reported on Heplisav Pre-BLA meeting with FDA. The company has a market cap of 513.57 million.

Activision Blizzard, Inc. (NASDAQ:ATVI) is down 0.74% in midday trading at $12.08. ATVI has traded 7 million shares so far today and trades 10.6 million shares a day on average. One of Activision’s biggest competitors, Electronic Arts, released their earnings yesterday. EA saw its Star Wars title perform very well with 2 million copies sold. Activision will announce their earnings on February 9. The company has a market cap of 13.80 billion.