- Tesla reported first-quarter earnings on Tuesday.
- Elon Musk talked Tesla's plans for a robotaxi and cheaper EVs.
- Shares rallied 10% in after-hours trading as investors shrugged off falling profits.
Tesla reported first-quarter earnings on Tuesday after the closing bell.
The electric-vehicle maker posted first-quarter earnings-per-share that fell short of consensus forecasts, but exceeded estimates for gross margin. Tesla also said it will accelerate production of new models of low-cost vehicles.