NEW YORK ( TheStreet) -- Shares of America Service Group (Nasdaq: ASGR) have taken a tremendous swing upward. The stock is trading at $25.78 as of 9:31 a.m. ET, 47.4% above Wednesday's closing price of $17.49. Volume is at 13,193, 0.4 times the daily average of 32,200. America Service Group has a market cap of $164 million and is part of the health care sector and health services industry. Shares are up 15.5% year to date as of the close of trading on Wednesday. America Service Group Inc., through its subsidiaries, provides managed healthcare services to correctional facilities primarily in the United States. The company has a P/E ratio of 17.9, below the average health services industry P/E ratio of 21.3 and below the S&P 500 P/E ratio of 21.5. TheStreet Ratings rates America Service Group as a buy. The company's strengths can be seen in multiple areas, such as its compelling growth in net income, revenue growth, largely solid financial position with reasonable debt levels by most measures, notable return on equity and increase in stock price during the past year. We feel these strengths outweigh the fact that the company shows weak operating cash flow. You can view the full America Service Group Ratings Report. See our top % gaining stocks list for other stocks that are soaring today, or get investment ideas from our investment research center.