4. As of noon trading, Alexion Pharmaceuticals ( ALXN) is down $1.75 (-1.8%) to $98.35 on light volume Thus far, 511,967 shares of Alexion Pharmaceuticals exchanged hands as compared to its average daily volume of 1.9 million shares. The stock has ranged in price between $98.25-$100.04 after having opened the day at $99.71 as compared to the previous trading day's close of $100.10. Alexion Pharmaceuticals, Inc., a biopharmaceutical company, engages in the development and commercialization of life-transforming therapeutic products. Alexion Pharmaceuticals has a market cap of $19.6 billion and is part of the health care sector. The company has a P/E ratio of 78.5, above the S&P 500 P/E ratio of 17.7. Shares are up 7.1% year to date as of the close of trading on Friday. TheStreet Ratings rates Alexion Pharmaceuticals as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures, expanding profit margins, good cash flow from operations and impressive record of earnings per share growth. We feel these strengths outweigh the fact that the company has had somewhat disappointing return on equity. Get the full Alexion Pharmaceuticals Ratings Report now. Exclusive Offer: Jim Cramer's 'go-to' small/mid-cap guru Bryan Ashenberg only buys stocks he thinks could return 50-100%. See his top picks for 14-days FREE.