Tesla Shares Jump Most in Two Months on Robotaxi Rollout (2)

Tesla Inc. shares climbed after the automaker rolled out its long-promised driverless taxi service to a handful of riders, a modest debut for what Elon Musk sees as a transformative new business line.

The first robotaxi trips were limited to a narrow portion of Tesla’s hometown of Austin on Sunday, with an employee sitting in the front passenger seat of each vehicle to monitor for safety. The carmaker hand-picked a friendly group of retail investors and social-media influencers to serve as initial riders and live-stream their trips.

A Tesla robotaxi vehicle in Austin on June 22.

Photographer: Tim Goessman/Bloomberg

In one video, Herbert Ong, who runs a fan account, marveled over ...