NEW YORK ( TheStreet) -- Sequenom (Nasdaq: SQNM) is trading at unusually high volume Tuesday with 8.7 million shares changing hands. It is currently at four times its average daily volume and trading down 30 cents (-4.4%) at $6.40 as of 3:52 p.m. ET. Sequenom has a market cap of $534.3 million and is part of the health care sector and drugs industry. Shares are down 16.6% year to date as of the close of trading on Monday. Sequenom, Inc. provides products, services, diagnostic testing, applications, and genetic analysis products that translate the results of genomic science into solutions for biomedical research, translational research, molecular medicine applications, and agricultural and livestock. TheStreet Ratings rates Sequenom as sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, disappointing return on equity and feeble growth in its earnings per share. You can view the full Sequenom Ratings Report.