NEW YORK ( TheStreet) -- Luminex Corporation (Nasdaq: LMNX) is trading at unusually high volume Tuesday with one million shares changing hands. It is currently at 4.4 times its average daily volume and trading up 72 cents (+3.2%) at $23.40 as of 3:55 p.m. ET. Luminex has a market cap of $953.5 million and is part of the health care sector and health services industry. Shares are up 2.3% year to date as of the close of trading on Monday. Luminex Corporation engages in the development, manufacture, and sale of proprietary biological testing technologies and products for the life sciences and diagnostic industries. The company has a P/E ratio of 73.8, above the average health services industry P/E ratio of 71.5 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Luminex as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures, expanding profit margins, solid stock price performance and notable return on equity. We feel these strengths outweigh the fact that the company has had sub par growth in net income. You can view the full Luminex Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.