NEW YORK ( TheStreet) -- Cepheid (Nasdaq: CPHD) is trading at unusually high volume Monday with 1.8 million shares changing hands. It is currently at four times its average daily volume and trading down $1.52 (-3.7%) at $39.25 as of 2:51 p.m. ET. Cepheid has a market cap of $2 billion and is part of the technology sector and electronics industry. Shares are up 79.2% year to date as of the close of trading on Friday. Cepheid, a molecular diagnostics company, develops, manufactures, and markets integrated systems for testing in the clinical market, as well as for application in legacy biothreat, industrial, and partner markets. TheStreet Ratings rates Cepheid as a hold. 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 and solid stock price performance. However, as a counter to these strengths, we find that the company's return on equity has been disappointing. You can view the full Cepheid 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.