Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of comScore (NASDAQ:SCOR) scored major gains today, up by as much as 24% after the company reported first-quarter earnings.

So what: Revenue in the first quarter came in at $68.8 million, with a net loss per share of $0.06. Both figures were ahead of expectations, as consensus estimates were calling for just $66.5 million in sales and a net loss of $0.07. CEO Dr. Magid Abraham said new customer activity was robust, adding 62 customers during the quarter.

Now what: Outlook for the second quarter calls for sales to be in the range of $65.5 million to $68 million, and full-year revenue should be $275.5 million to $283.5 million. The midpoints of both forecasts are above consensus. Goldman Sachs upgraded the stock from "sell" to "neutral," believing that the business has stabilized. Cantor Fitzgerald boosted its rating on shares from "hold" to "buy" and added that comScore's new offerings appear to be gaining traction.

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