NEW YORK ( TheStreet) -- Cepheid (Nasdaq: CPHD) is trading at unusually high volume Friday with 2.9 million shares changing hands. It is currently at four times its average daily volume and trading down $3.04 (-7.5%) at $37.54 as of 3:15 p.m. ET. Cepheid has a market cap of $2.58 billion and is part of the technology sector and electronics industry. Shares are up 16% year to date as of the close of trading on Thursday. Cepheid, a molecular diagnostics company, engages in developing, manufacturing, and marketing integrated systems for testing in the clinical market, as well as for application in legacy biothreat, industrial, and partner markets. The company has a P/E ratio of 997.5, above the average electronics industry P/E ratio of 983.3 and above the S&P 500 P/E ratio of 17.7. 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 expanding profit margins. However, as a counter to these strengths, we also find weaknesses including unimpressive growth in net income and weak operating cash flow. 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.