NEW YORK ( TheStreet) -- Tractor Supply (Nasdaq: TSCO) is trading at unusually high volume Thursday with 3.7 million shares changing hands. It is currently at four times its average daily volume and trading up $1.83 (+2%) at $91.35 as of 4 p.m. ET. Tractor Supply has a market cap of $6.66 billion and is part of the services sector and specialty retail industry. Shares are up 27.6% year to date as of the close of trading on Wednesday. Tractor Supply Company operates retail farm and ranch stores in the United States. The company has a P/E ratio of 27.9, equal to the average specialty retail industry P/E ratio and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Tractor Supply as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, impressive record of earnings per share growth, compelling growth in net income, notable return on equity and good cash flow from operations. We feel these strengths outweigh the fact that the company is trading at a premium valuation based on our review of its current price compared to such things as earnings and book value. You can view the full Tractor Supply Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.