A published report Friday said the FBI is conducting a criminal investigation into whether electric-car maker Tesla misled investors by overstating production forecasts for its Model 3 sedan.
The Wall Street Journal reported that FBI agents have contacted former Tesla employees to interview them. The paper cited anonymous people familiar with the matter.
A Tesla spokesman said the company was transparent about the difficulty of increasing production of the Model 3. He said the company cooperated with a "voluntary request" for documents from the Justice Department earlier this year and has received no additional requests on the matter for months.
The FBI did not immediately return a call seeking comment.
Tesla Inc. shares, which were enjoying a rally on Friday, gave up most of the gain immediately after the Journal posted the report. But they recovered and closed at US$330.90 ($510.13), a gain of US$16.04, or 5 per cent on the day. That capped a week in which the shares jumped 27 per cent, helped by strong third-quarter financial results.