NEW YORK ( TheStreet) -- West Pharmaceutical Services (NYSE: WST) is trading at unusually high volume Tuesday with 417,922 shares changing hands. It is currently at four times its average daily volume and trading up $4.95 (+12.4%) at $44.88 as of 2:55 p.m. ET. West Pharmaceutical Services has a market cap of $1.36 billion and is part of the health care sector and health services industry. Shares are up 5.2% year to date as of the close of trading on Monday. West Pharmaceutical Services, Inc. manufactures and sells components and systems for injectable drug delivery and plastic packaging, and delivery system components for the pharmaceutical, healthcare, and consumer products industries. The company has a P/E ratio of 18.4, below the average health services industry P/E ratio of 18.7 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates West Pharmaceutical Services as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, growth in earnings per share, compelling growth in net income, reasonable valuation levels and expanding profit margins. We feel these strengths outweigh the fact that the company shows weak operating cash flow. You can view the full West Pharmaceutical Services 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.