NEW YORK ( TheStreet) -- Medco Health Solutions (NYSE: MHS) is trading at unusually high volume Tuesday with 13.4 million shares changing hands. It is currently at 4.1 times its average daily volume and trading up $2.13 (+3.1%) at $70.48 as of 3:50 p.m. ET. Medco Health has a market cap of $24 billion and is part of the services sector and wholesale industry. Shares are up 22.3% year to date as of the close of trading on Monday. Medco Health Solutions, Inc., a healthcare company, provides clinically-driven pharmacy services for private and public employers, health plans, labor unions, government agencies, and individuals worldwide. The company has a P/E ratio of 18.9, above the average wholesale industry P/E ratio of 18.1 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Medco Health as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, notable return on equity, growth in earnings per share, solid stock price performance and increase in net income. We feel these strengths outweigh the fact that the company has had generally poor debt management on most measures that we evaluated. You can view the full Medco Health Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are rising on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVUP to 95370 or select from multiple alert options.