NEW YORK ( TheStreet) -- Shares of Altra Holdings Incorporated (Nasdaq: AIMC) were gapping down Thursday morning with an open price 11.6% lower than Wednesday's closing price. The stock closed at $21.54 Wednesday and opened today's trading at $19.05. The average volume for Altra has been 177,800 shares per day over the past 30 days. Altra has a market cap of $514 million and is part of the industrial goods sector and industrial industry. Shares are up 14.4% year to date as of the close of trading on Wednesday. Altra Holdings, Inc., through its subsidiary, Altra Industrial Motion, Inc., designs, produces, and markets a range of mechanical power transmission and motion control products worldwide. The company has a P/E ratio of 15.6, above the average industrial industry P/E ratio of 13.7 and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Altra as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, impressive record of earnings per share growth and compelling growth in net income. However, as a counter to these strengths, we also find weaknesses including poor profit margins and generally poor debt management. You can view the full Altra Ratings Report. Get more investment ideas from our investment research center. Interested in other stocks that are gapping down? Get free SMS text alerts sent to you when the action happens by texting DOWN to 95370 or select from multiple alert options.