NEW YORK ( TheStreet) -- Rush (Nasdaq: RUSHA) is trading at unusually high volume Tuesday with 666,028 shares changing hands. It is currently at four times its average daily volume and trading up 54 cents (+3%) at $18.62 as of 2:19 p.m. ET. Rush has a market cap of $512.6 million and is part of the services sector and specialty retail industry. Shares are down 13.6% year to date as of the close of trading on Monday. Rush Enterprises, Inc., through its subsidiaries, operates as an integrated retailer of commercial vehicles and related services in the United States. The company owns and operates a network of commercial vehicle dealerships under the Rush Truck Centers name. The company has a P/E ratio of 13, above the average specialty retail industry P/E ratio of 11.3 and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Rush 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, a generally disappointing performance in the stock itself and generally poor debt management. You can view the full Rush Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.