Eight months after it seemed headed for the corporate junkyard,...

Eight months after it seemed headed for the corporate junkyard, Tesla is now worth more than General Motors, Ford and Fiat Chrysler combined, even though the Big Three together sell more cars and trucks in two weeks than Tesla does in a whole year.

In a reversal of fortune analysts find amazing if not nutty, the stock of the electric vehicle and solar panel maker has rocketed to nearly $US900 ($134), up more than 30 per cent in just the past two days.

It is now worth five times what it was in June, when there were whispers of bankruptcy surrounding the company founded by the erratic visionary Elon Musk.

Among the world’s automakers, Tesla, with a market value Tuesday just shy of $US160 billion, ranks behind only Toyota, at $US232 billion.

Many investors see it as justified for a company that is leading the world in electric vehicle sales amid an expected global transition from the internal combustion engine to batteries.

Others see the meteoric rise as just plain crazy for a company that’s never turned a full-year profit.

“It doesn’t seem to be closely attached to reality,” said Gartner analyst Mike Ramsey.

Tesla sold only 367,500 vehicles last year, compared with millions at GM, Ford or Fiat Chrysler. GM alone sold 7.7 million, 21 times more than Tesla.

While the spectacular run-up in the stock has been attributed in part to rising profits and other encouraging signs from Tesla, it has been amplified, paradoxically, by the many investors who have been betting “shorting” the stock — that is, betting it would drop. As the stock goes up, these investors are losing money, so they try to limit their losses by rushing in to buy, driving the price even higher.

Just last spring, Tesla seemed to be in trouble. Its stock had fallen 40 per cent largely on concerns that it was running out of buyers for its high-priced vehicles, which start at nearly $US40,000 and can run well over $US100,000.

Big debt payments were looming, the company was burning cash and losses were growing. Its federal tax credit was being phased out by the end of the year, and competitors were about to launch their own electric vehicles.

But sales emerged stronger than many expected, production problems were vanquished, and while Tesla lost $US862 million in 2019, it turned a profit during the last two quarters of the year, including $US105 million in quarterly earnings posted last week.

Among the positive news coming from the automaker: Tesla said it expects to exceed production of 500,000 vehicles this year at its factories in Fremont, California, and Shanghai. It appears to have worked the kinks out of making the Model 3 small car, the company’s lowest-priced vehicle. And it announced it will start producing the Model Y, a small SUV with broad global appeal, sooner than expected.

“For Tesla worldwide, this will probably be their most important car,” said Jessica Caldwell, executive director of insights at the Edmunds.com auto pricing site, which provides content for The Associated Press.

Tasha Keeney, an analyst at ARK Invest, one of the firms most bullish on Tesla, said investors have figured out that Tesla is ahead of competitors in such things as battery technology and software. Also, demand for electric vehicles over the next five years is probably underestimated, she said.

“We think an electric vehicle will be cost-competitive on a sticker price basis with a gas-powered car by 2022, and this is what’s going to cause an inflection in demand,” Keeney said.

The run-up in price is, like all stock investments, a bet on the future. Electric vehicles account for just 2 per cent of global vehicle sales, and Tesla is up against well-established competitors such as GM, Ford, Audi and Porsche.

Musk has long railed against “short sellers,” or investors who borrow stock in a company and then sell it in hopes of buying it back later at a lower price and pocketing the difference. Because of persistent doubts about Musk’s ability to realize his big ambitions, Tesla is the most heavily shorted company on the U.S. stock market.

Now the short sellers are feeling the pain.