NEW YORK ( TheStreet) -- Pharmaceutical Product Development (Nasdaq: PPDI) is trading at unusually high volume Tuesday with four million shares changing hands. It is currently at four times its average daily volume and trading up 66 cents (+2.1%) at $32.17 as of 3:12 p.m. ET. Pharmaceutical Product Development has a market cap of $3 billion and is part of the health care sector and health services industry. Shares are up 16.1% year to date as of the close of trading on Monday. Pharmaceutical Product Development, Inc., a contract research organization, provides drug discovery, development, and lifecycle management services. It operates in two segments, Development and Laboratory Services. The company has a P/E ratio of 42.2, above the average health services industry P/E ratio of 18.5 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Pharmaceutical Product Development as a buy. The company's strengths can be seen in multiple areas, such as its solid stock price performance, compelling growth in net income, revenue growth, reasonable valuation levels and notable return on equity. Although the company may harbor some minor weaknesses, we feel they are unlikely to have a significant impact on results. You can view the full Pharmaceutical Product Development 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.