Industry data show Tesla’s UK car registrations plunged by more than 29% year-on-year in December, marking the steepest monthly decline in its largest European market since early 2020. The EV maker delivered just over 7,500 units compared with roughly 10,600 in the same month last year, as aggressive pricing and new model launches from Volkswagen, BMW and Hyundai eroded Tesla’s market share.

Mobileye secured a major contract with a leading ride-hailing operator this week, choosing a combined camera-and-radar sensor suite over Tesla’s cameras-only approach. The decision underscores growing doubts about Tesla’s reliance on vision-only hardware for Full Self-Driving, especially after safety regulators cited gaps in redundancy and object-detection performance in recent reviews.

Elon Musk reiterated on the October earnings call that Tesla plans to begin mass production of its dedicated Cybercab in April, with the single largest planned production increase coming in the second quarter. Management forecasts building up to 100,000 units by year-end, but stressed that unsupervised robotaxi approvals remain pending in all jurisdictions. Regulatory green lights will need to keep pace with assembly-line output to avoid an inventory backlog of vehicles lacking steering wheels or pedals.

Tesla shares rallied more than 4% on Monday after investors lauded record energy storage deployments and progress in robotaxi testing, only to tumble through a seven-day losing streak that erased roughly $163 billion in market capitalization. The roller-coaster performance highlights growing retail-trader engagement—often driven by meme-stock dynamics—as well as concerns over slowing deliveries and an intensifying competitive landscape.