Tesla shares plummeted 15%, triggering a short-sale circuit breaker earlier. The electric car company late Tuesday forecast little change in fourth-quarter adjusted earnings compared with the third quarter, which weighed on shares. The company beat estimates as it narrowed its third-quarter loss to 32 cents a share from a loss of $1.05 a share in the year-earlier quarter. "We think sentiment may be retracing prior exuberance as investors recalibrate the pace of unit growth, infrastructural/retail investments, and global expansion," James Albertine, an analyst at Stifel Nicolaus, said in a report.