NEW YORK ( TheStreet) -- Sequenom (Nasdaq: SQNM) is trading at unusually high volume Tuesday with 6.1 million shares changing hands. It is currently at four times its average daily volume and trading down 63 cents (-11.3%) at $4.93 as of 2:56 p.m. ET. Sequenom has a market cap of $527.6 million and is part of the health care sector and drugs industry. Shares are down 30.8% 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 research. TheStreet Ratings rates Sequenom as a sell. The company's weaknesses can be seen in multiple areas, such as its weak operating cash flow and generally disappointing historical performance in the stock itself. You can view the full Sequenom 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 falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.