NEW YORK ( TheStreet) -- Sanofi-Aventis (NYSE: SNY) is trading at unusually high volume Tuesday with 13.9 million shares changing hands. It is currently at 5.8 times its average daily volume and trading up 90 cents (+2.6%) at $35.48 as of 12:47 p.m. ET. Sanofi-Aventis has a market cap of $89.6 billion and is part of the health care sector and drugs industry. Shares are up 7.3% year to date as of the close of trading on Monday. Sanofi-Aventis, a healthcare company, engages in the discovery, development, and distribution of therapeutic solutions to improve the lives of everyone. The company has a P/E ratio of 18.4, above the average drugs industry P/E ratio of 12.2 and below the S&P 500 P/E ratio of 21.8. TheStreet Ratings rates Sanofi-Aventis as a hold. The company's strengths can be seen in multiple areas, such as its largely solid financial position with reasonable debt levels by most measures, reasonable valuation levels and expanding profit margins. However, as a counter to these strengths, we also find weaknesses including deteriorating net income, disappointing return on equity and a generally disappointing performance in the stock itself. You can view the full Sanofi-Aventis Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.