NEW YORK ( TheStreet) -- Tam (NYSE: TAM) is trading at unusually high volume Thursday with 6.4 million shares changing hands. It is currently at 11.1 times its average daily volume and trading up 50 cents (+2.4%) at $21.66 as of 3:55 p.m. ET. Tam has a market cap of $3.35 billion and is part of the services sector and transportation industry. Shares are up 9.4% year to date as of the close of trading on Wednesday. TAM S.A. provides passengers and cargo air transportation services in Brazil and internationally. It also engages in the aircraft acquisition, financing, and debt issuance activities. The company has a P/E ratio of 13.1, below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Tam as a hold. Among the primary strengths of the company is its generally strong cash flow from operations. At the same time, however, we also find weaknesses including deteriorating net income, generally poor debt management and disappointing return on equity. You can view the full Tam Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.