NEW YORK ( TheStreet) -- Select Medical Holdings Corporation (NYSE: SEM) is trading at unusually high volume Wednesday with 1.5 million shares changing hands. It is currently at 4.3 times its average daily volume and trading up 90 cents (+11.5%) at $8.75 as of 1:45 p.m. ET. Select Medical has a market cap of $1.1 billion and is part of the health care sector and health services industry. Shares are down 7.4% year to date as of the close of trading on Tuesday. Select Medical Holdings Corporation, through its subsidiary, Select Medical Corporation, operates specialty hospitals and outpatient rehabilitation clinics in the United States. The company has a P/E ratio of 12.7, above the average health services industry P/E ratio of 10.9 and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Select Medical as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, impressive record of earnings per share growth and compelling growth in net income. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, generally poor debt management and poor profit margins. You can view the full Select Medical Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.