What happened Shares of natural gas fuel company Clean Energy Fuels Corp (NASDAQ: CLNE) jumped a whopping 46.3% in trading late on Friday after the company announced a big stock repurchase program. Shares happened to close at their high today, showing that investors were pushing the stock higher all day. So what The big news was a $30 million stock repurchase program that was approved by Clean Energy Fuels' Board of Directors. The fact that a company with a market cap of just over $200 million at the close yesterday announced such a big repurchase program shows how bullish management is on the stock. Image source: Getty Images. It didn't hurt that oil was up 4.7% today, recovering from a nearly month-long plunge. Diesel is the biggest competition for natural gas fuel, so higher prices for the underlying oil is generally good news for the natural gas industry. Now what The fact that management is looking to buy as much as 15% of the company back from the market shows that they think Clean Energy Fuels is undervalued. If you're bullish on the stock, this is a great indicator of what insiders think of its future. What makes me a little cautious about this energy stock is that it's only barely profitable right now. In 2019, Clean Energy's net income was just $20.4 million, and with energy prices falling across the board there may be pressure on the business in 2020. But management thinks a turnaround is here, and that's why shares are up big to end the week. 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 December 1, 2019 Travis Hoium has no position in any of the stocks mentioned. The Motley Fool recommends Clean Energy Fuels. The Motley Fool has a disclosure policy.Source