NEW YORK ( TheStreet) -- Atlas Pipeline Partners (NYSE: APL) is trading at unusually high volume Monday with 1.8 million shares changing hands. It is currently at 4.4 times its average daily volume and trading up $1.74 (+6%) at $30.66 as of 10:11 a.m. ET. Atlas Pipeline has a market cap of $1.5 billion and is part of the basic materials sector and energy industry. Shares are up 17.2% year to date as of the close of trading on Friday. Atlas Pipeline Partners, L.P., through its subsidiaries, engages in gathering and processing natural gas. TheStreet Ratings rates Atlas Pipeline as a hold. The company's strengths can be seen in multiple areas, such as its solid stock price performance, 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 disappointing return on equity and poor profit margins. You can view the full Atlas Pipeline Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.