Shares dropped almost 5% after the automaker was reported to have asked US suppliers for refunds, unnerving some investors

Tesla took another financial hit on Monday, with shares in the company dropping almost 5% after the electric automaker was reported to have asked some US suppliers to return payments to the money-losing company.

The disclosure was contained in a memo sent last week by a global supply manager and obtained by the Wall Street Journal. In it, the manager described the payments as essential to Tesla’s operation.

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The leak came soon after Tesla announced it was cutting several thousand jobs as part of an effort to reduce costs. Tesla has been burning through cash at a rate of about $1bn a quarter, or more than $7,430 every minute, according to data compiled by Bloomberg, and finished the first quarter with $2.7bn in cash on hand.

The company’s rapidly weakening cash position has spooked investors, and comes despite the claims of founder Elon Musk that Tesla is now a “real” carmaker after hitting a weekly goal of producing more than 5,000 mass-market Model 3s, the rate of production that the manufacturer hopes will turn the company’s economic position around.

The company has asked for an undisclosed rebate on money it has spent on 10 suppliers since 2016.

After the memo was leaked over the weekend, Musk tweeted: “Only costs that actually apply to Q3 & beyond will be counted. It would not be correct to apply historical cost savings to current quarter.”

In a statement released on Monday, Tesla added: “Negotiation is a standard part of the procurement process, and now that we’re in a stronger position with Model 3 production ramping, it is a good time to improve our competitive advantage in this area.”

Still, industry analysts said it is unusual for automakers to request refunds for two previous years, as Tesla has demanded. “This is troubling for us to hear,” said Morningstar analyst David Whiston in a note to clients.

The leak comes as Musk continues to unnerve investors, with Tesla shares falling from a year high of $370 in mid June to around $301 on Monday. An analyst at Baillie Gifford, Tesla’s third-largest institutional shareholder, told the Journal the firm is “divided” on whether Musk is the right leader for Tesla.

The latest bad news came after the entrepreneur got into a confrontation with Vernon Unsworth, a British cave diver who helped rescue a team of Thai soccer players from a system of flooded caves. Musk launched a personal attack on the rescue worker after Unsworth questioned the usefulness of a mini-submarine Musk offered help in the rescue. Musk was ultimately forced to apologise.

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In early May, Musk cut off analysts from Bernstein and RBC Capital who had asked if the company should raise more capital while it could even if it did not need it. Musk responded that he “specifically” did not want to, and called the analyst’s questions “so dry. They’re killing me.”

Tesla’s stock declined 6% in about a 20-minute period after his tirade.

As a possible crunch for Tesla approaches, Musk has said he has personally taken control of production and that he was sleeping occasionally at the factory.

• This article was amended on 26 July 2018. An earlier version said Musk cut off a Morgan Stanley analyst who had asked if the company should raise more capital. An analyst from Morgan Stanley commented on the call, but Musk cut off analysts from Bernstein and RBC Capital.

