NEW YORK ( TheStreet) -- Clean Energy Fuels Corporation (Nasdaq: CLNE) is trading at unusually high volume Monday with 3.9 million shares changing hands. It is currently at 4.1 times its average daily volume and trading up $1.58 (+8.4%) at $20.32 as of 3:20 p.m. ET. Clean Energy has a market cap of $1.05 billion and is part of the utilities sector and utilities industry. Shares are up 50.4% year to date as of the close of trading on Friday. Clean Energy Fuels Corp., together with its subsidiaries, provides natural gas as an alternative fuel for vehicle fleets in the United States and Canada. It designs, builds, finances, and operates fueling stations; and supplies compressed and liquefied natural gas. TheStreet Ratings rates Clean Energy as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, solid stock price performance and largely solid financial position with reasonable debt levels by most measures. However, as a counter to these strengths, we also find weaknesses including unimpressive growth in net income, weak operating cash flow and poor profit margins. You can view the full Clean Energy Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are rising on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVUP to 95370 or select from multiple alert options.