NEW YORK ( TheStreet) -- Illumina (Nasdaq: ILMN) is trading at unusually high volume Wednesday with 12.5 million shares changing hands. It is currently at four times its average daily volume and trading down $2 (-4.5%) at $42 as of 10:35 a.m. ET. Illumina has a market cap of $6.49 billion and is part of the health care sector and drugs industry. Shares are up 44.4% year to date as of the close of trading on Tuesday. Illumina, Inc. develops, manufactures, and markets life science tools and integrated systems for the analysis of genetic variation and biological function in North America, Europe, Latin America, the Asia-Pacific, the Middle East, and South Africa. The company has a P/E ratio of 72.5, below the average drugs industry P/E ratio of 84.9 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Illumina as a hold. The company's strengths can be seen in multiple areas, such as its good cash flow from operations, expanding profit margins and largely solid financial position with reasonable debt levels by most measures. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, deteriorating net income and disappointing return on equity. You can view the full Illumina Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.