Stock index futures moved lower just before the market open on Tuesday morning, spurred by lawmakers' failure to make progress in discussions about raising the debt ceiling. Declines were relatively modest, with the Nasdaq Composite leading the way lower with a drop of about a third of a percent.

Even with the downbeat mood on Wall Street, some stocks managed to post solid gains. Yelp (NYSE: YELP) became the subject of speculation about a potential sale of the company, while PacWest Bancorp (NASDAQ: PACW) continued to gain ground as sentiment concerning regional banks kept improving. Read on to get the details about both of these stocks.

Shares of Yelp were higher by 11% in premarket trading Tuesday morning. The move came amid calls for the review website to look at ways to enhance shareholder value.

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Source Fool.com