What happened After less than a month on the public markets, the Israeli start-up X-ray machine maker Nano-X Imaging (NASDAQ: NNOX) has more than doubled off its $18 offer price. Shares shot up more than 15% in early trading Tuesday and were still up about 7.7% at 1:50 p.m. EDT. So what Nano-X was rising in a market where the rest of the Nasdaq is down more than 2% despite there being no particular news of note. Nor has Nano-X said anything market-moving itself today. I suspect investors are just still enthused by the rapid rise of this medical technology stock, and its disruptive business model. It is promising to build X-ray machines for $10,000 and then give them away, making money instead by charging for use of the machines. Image source: Getty Images. Now what In a business where X-ray machines ordinarily cost upward of $2 million, Nano-X's promise to give the machines away is certain to attract interest, even as its pay-per-use business model (the latest example of selling hardware as a service) promises to generate recurring revenue streams far into the future. In the meantime, Nano-X remains a money-losing start-up with literally no revenue to speak of. It's an extremely speculative stock, albeit one that is rewarding its speculators richly today. 10 stocks we like better than Nano-X Imaging Ltd.When 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 Nano-X Imaging Ltd. 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 August 1, 2020 Rich Smith has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.Source