NEW YORK ( TheStreet) -- Shares of Healthspring (NYSE: HS) have taken a tremendous swing upward. The stock is trading at $53.47 as of 9:30 a.m. ET, 33.1% above Friday's closing price of $40.16. Volume is at 6.9 million, 6.6 times the daily average of one million.

Healthspring has a market cap of $2.7 billion and is part of the health care sector and health services industry. Shares are up 51.4% year to date as of the close of trading on Friday.

HealthSpring, Inc., through its subsidiaries, operates as a managed care organization in the United States. It focuses primarily on Medicare, the federal government sponsored health insurance program for the U.S. The company has a P/E ratio of 10.3, equal to the average health services industry P/E ratio and below the S&P 500 P/E ratio of 17.7.

TheStreet Ratings rates Healthspring as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures, solid stock price performance, impressive record of earnings per share growth and compelling growth in net income. We feel these strengths outweigh the fact that the company shows weak operating cash flow. You can view the full Healthspring Ratings Report.

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