A regulatory filing says officials have asked about software that Elon Musk, the chief executive, has said would allow cars to operate autonomously.
The automaker reduced the price of the Mustang Mach-E by up to $5,900 after Tesla slashed prices of its cars by as much as 20 percent.
Shares in the electric carmaker continued to rally after the company reported strong profits, even amid growing competition and economic pressures.
The electric car company is facing intensifying competition, supply chain disruptions and concerns about the behavior of Elon Musk.
The $3.6 billion investment, which also includes a new battery factory, presents a challenge to traditional truck makers that have been slow to sell electric vehicles.
Under questioning, Mr. Musk said he hadn’t discussed how much money investors would put in to help him take his car company private.
Mr. Musk is testifying in a lawsuit filed by investors who claim that his statements about a plan to take Tesla private in 2018 caused them to lose billions of dollars.
The chief executive of Tesla testified in a federal civil trial about a 2018 plan to take the automaker private that fizzled out.
A wave of lawsuits argue that Tesla’s self-driving software is dangerously overhyped. What can its blind spots teach us about the company’s erratic C.E.O.?
Investors are seeking billions of dollars in damages for their losses after Mr. Musk posted a proposal on Twitter that never materialized.
The price reductions in the United States will make more of the company’s electric vehicles eligible for a federal tax credit.
The revolution is also a case study in how much further we have to go.
The network could help increase the low number of charging stations, encouraging more people to buy electric vehicles.
Worry about the carmaker’s sales in the world’s largest car market is one reason the shares have plunged.
Automakers have been hampered by the supply of semiconductors and higher interest rates.
A huge sell-off wiped billions of dollars from the electric carmaker’s market capitalization on Tuesday. Analysts see more trouble ahead.
The company’s rapid growth is expected to ease as the economy slows and demand for its electric cars weakens.
Does Elon know who buys his stuff?
Investors blame Elon Musk and wonder how much more the stock will fall.
Foreign-made cars no longer qualify. Tesla and G.M. should become eligible again. But officials are still working on the fine print.