AUSTIN, Texas — Tesla Inc. shares fell about 2.6 percent Tuesday morning, trading near $358.28, as investors locked in August gains ahead of a Cybercab event scheduled for Thursday at the company's Texas headquarters.

The stock was down $9.67 from the prior close. The auto-parts group was also weaker, while Ford and General Motors traded slightly higher. Tesla had climbed through August on delivery optimism and autonomy headlines. Short-term momentum readings had moved into overbought territory, and the pullback fit a familiar pattern: sell into a binary product day.

Tesla has invited Robotaxi app users to the Sept. 3 Cybercab launch in Austin. State records show the company registered 45 Cybercabs with the Texas Department of Motor Vehicles on Aug. 31, a step toward commercial use on Texas roads. Robotaxi service already runs 6 a.m. to 10 p.m., seven days a week, in Austin, Dallas, Houston, Miami, Orlando and Tampa. Nevada regulators this month also approved Las Vegas permits for Tesla, Uber........

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