Google plunged almost 10 percent Friday -- more than $50/share -- after a worse than expected earnings report and outlook released Thursday. Among shareholder concerns were a slowdown in the company's hiring and CEO Eric Schmidt's description of the economy as "challenging".

The company reported earnings of $4.63/share if costs related to stock compensation were left out, just short of the street's earnings estimate of $4.74 according to analysts surveyed by Thomson Financial.

Google stock is down more than 30 percent on the year, more than double the percentage drop by the S&P 500, which is down just over 14 percent year-to-date.