NEW YORK ( TheStreet) -- Shares of Infinity Pharmaceuticals (Nasdaq: INFI) were gapping down Monday morning with an open price 17.9% lower than Friday's closing price. The stock closed at $13.88 Friday and opened today's trading at $11.39. The average volume for Infinity has been 211,000 shares per day over the past 30 days. Infinity has a market cap of $361.7 million and is part of the health care sector and drugs industry. Shares are up 52.1% year to date as of the close of trading on Friday. Infinity Pharmaceuticals, Inc. engages in the discovery and development of medicines for difficult-to-treat diseases. TheStreet Ratings rates Infinity as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, disappointing return on equity, weak operating cash flow, generally weak debt management and feeble growth in its earnings per share. You can view the full Infinity Ratings Report. Get more investment ideas from our investment research center.