What happened Shares of natural gas fuel supplier Clean Energy Fuels (NASDAQ: CLNE) jumped in Tuesday afternoon trading, and are currently up 7.6% as of 1:40 p.m. EST. The pop follows Clean Energy's announcement this morning that it has signed contracts with new and existing customers to supply more than 58 million gallons of Redeem renewable natural gas (RNG) over various periods of time. Image source: Getty Images. So what The duration of the contracts, and the amount of time they will be spread across, will determine whether today's pop in stock price is truly deserved. In a long press release, Clean Energy named several of its customers -- Linden Bulk Transportation, Food Express, Adopt-A-Port, CR&R Environmental Services, and the Denver International Airport -- and gave more or less precise periods for execution of its contracts for some of them: anywhere from mid-2021 for Food Express to "multi-year" for Linden Bulk. Now what No value was given for any of the contracts featured in the press release, however, and without knowing that, and the precise time for fulfillment of each contract described, it's hard to say exactly how big of a deal "more than 58 million gallons" of fuel contracts is for Clean Energy stock, or how much it will translate to in terms of revenue and profits. On balance, I fear what we're looking at here is more in the nature of a puff piece, than actual, investable news. And with Clean Energy Fuels stock still priced at about 24.5 times earnings, with a projected earnings growth rate of only 15%, the stock still looks a bit on the pricey side to me. 10 stocks we like better than Clean Energy FuelsWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Clean Energy Fuels wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of November 20, 2020 Rich Smith has no position in any of the stocks mentioned. The Motley Fool recommends Clean Energy Fuels. The Motley Fool has a disclosure policy.Source