Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

- Lululemon (LULU) shares are diving as its China business is showing signs of strain, with revenue in mainland China falling 2% in the second quarter after adjusting for currency fluctuations.

- Tesla (TSLA) shares are lower on news it formally rolled out the Cybercab for robotaxi service, a long-anticipated step in Elon Musk’s effort to push the company away from its roots as an auto manufacturer. The US National Highway Traffic Safety Administration opened a probe into the process and technical data on which Tesla relied when it self-certified the vehicles as compliant with federal safety standards.

- Robinhood (HOOD) is down as AMC Entertainment boss Adam Aron criticized Robinhood Markets Inc. after the platform launched a tokenized version of the theater chain’s shares.