Friday's Winners & Losers: Yahoo!

Yahoo!'s(YHOO Quote) stock rose $1.86, or 6.9%, to $28.67 on increasing speculation that Microsoft(MSFT Quote) might raise its $31-a-share offer for the company. Yahoo! is also reportedly signing a deal with Google(GOOG Quote) to outsource its search to Google in return for a share in the revenue.

Discovery Labs (DSCO Quote) was brushed off by the Food and Drug Administration for a third time. The agency didn't approve its Surflaxin, a treatment for the prevention of respiratory distress syndrome (RDS) in premature infants, but said it could be approvable in the future if certain, undisclosed, conditions are met. Shares sank $1.40, or 48.2%, to $1.50. The company said investors can expect an update from the company early next week.

ComScore(SCOR Quote) gained $2.86, or 14.4%, to $22.70 after it beat anlaysts' expectations for the first quarter and raised its outlook for the current year. An analyst at Oppenheimer upgraded the stock to outperform from perform following the results. Net income for the quarter rose to $2.5 million from $1.5 million a year ago. EPS, excluding items, was 18 cents. Revenue rose 41% to $26.4 million. Analysts had been expecting earnings of 10 cents a share on revenue of $26.1 million.

One of the biggest losers for the day was Investools (SWIM Quote), which was plunging 31.4% after it disclosed that the Securities and Exchange Commission was looking into some of its business practices. The provider of investor education products said it was cooperating with the inquiry, but the bad news overshadowed the company's first-quarter profit. Shares were trading down $3.92 to $8.56.