NEW YORK ( TheStreet) -- Altra Holdings Incorporated (Nasdaq: AIMC) is trading at unusually high volume Wednesday with 659,810 shares changing hands. It is currently at four times its average daily volume and trading up 50 cents (+2.4%) at $21.02 as of 2:51 p.m. ET. Altra has a market cap of $578.8 million and is part of the industrial goods sector and industrial industry. Shares are up 3.3% year to date as of the close of trading on Tuesday. Altra Holdings, Inc., together with its subsidiary, Altra Industrial Motion, Inc., designs, produces, and markets a range of mechanical power transmission and motion control products primarily in North America, Europe, and Asia. The company has a P/E ratio of 34.9, above the average industrial industry P/E ratio of 34.3 and above the S&P 500 P/E ratio of 21.9. TheStreet Ratings rates Altra as a hold. The company's strengths can be seen in multiple areas, such as its compelling growth in net income, revenue growth and impressive record of earnings per share growth. However, as a counter to these strengths, we also find weaknesses including weak operating cash flow, generally poor debt management and poor profit margins. You can view the full Altra Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.