Elon Musk says no contract has been signed with Hertz after the rental car company announced a deal that led to Tesla's market value surpassing $1 trillion.

Last week, shares in Tesla jumped 12.6% after Hertz said it had ordered 100,000 vehicles by the end of 2022.

However, Mr Musk tweeted: "I'd like to emphasize that no contract has been signed yet."

Both companies have been asked for comment.

The deal announced by Hertz with Tesla was the biggest-ever rental car order for electric vehicles.

"Electric vehicles are now mainstream, and we've only just begun to see rising global demand and interest," said Hertz interim boss Mark Fields.

It was reported Hertz would pay $4.2bn for 100,000 Model 3s over the next 14 months, which amounts to about a fifth of its fleet. The rental firm would also build a network of charging stations.

Hertz said that "beginning in early November and expanding through year end" customers would be able to rent a Tesla Model 3 at Hertz airport and neighbourhood locations at certain areas in the US and Europe.

You’re welcome!

If any of this is based on Hertz, I’d like to emphasize that no contract has been signed yet.

Tesla has far more demand than production, therefore we will only sell cars to Hertz for the same margin as to consumers.

Hertz deal has zero effect on our economics.

— Elon Musk (@elonmusk) November 2, 2021

But on Tuesday, Tesla boss Mr Musk tweeted: "Tesla has far more demand than production, therefore we will only sell cars to Hertz for the same margin as to consumers.

"Hertz deal has zero effect on our economics."

Tesla became the fifth company to surpass a market value of $1 trillion on 25 October, behind Apple, Microsoft, Amazon and Google-owner Alphabet.

In response to a tweet about the Hertz deal on 25 October, Mr Musk said it was "strange that moved valuation, as Tesla is very much a production ramp problem, not a demand problem".

He later added: "To be clear, cars sold to Hertz have no discount. Same price as to consumers."

It is not the first time that Mr Musk's tweets regarding his company have made the news.

In May 2020, he wiped $14bn (£11bn) off the carmaker's value after tweeting its share price was too high.

And two years earlier, a tweet about Tesla's future on the New York stock market led to regulators fining the company $20m and Mr Musk agreeing to have all further posts on the platform pre-screened by lawyers.