NEW YORK ( TheStreet) -- Gen-Probe (Nasdaq: GPRO) is trading at unusually high volume Monday with 2.2 million shares changing hands. It is currently at 7.9 times its average daily volume and trading up $13.16 (+19.2%) at $81.88 as of 9:30 a.m. ET. Gen-Probe has a market cap of $3.12 billion and is part of the services sector and diversified services industry. Gen-Probe Incorporated engages in the development, manufacture, and marketing of molecular diagnostic products and services that are used primarily to diagnose human diseases and screen donated human blood. TheStreet Ratings rates Gen-Probe as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, good cash flow from operations, expanding profit margins and largely solid financial position with reasonable debt levels by most measures. We feel these strengths outweigh the fact that the company has had sub par growth in net income. You can view the full Gen-Probe Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.