Musk Loses $4.9 Billion in Tesla's Worst-Ever Start to a Year

Tesla Inc. shares have never had a worse start to a year than in 2019, and Elon Musk is paying the biggest price.

The stock has tumbled 43% this year through Thursday, lopping $4.9 billion from the value of Musk’s stake, as Wall Street has grown increasingly skeptical about consumer demand for the company’s electric vehicles. Musk, 47, is now ranked No. 46 on the Bloomberg Billionaires Index with a net worth of $19.7 billion, down from 29th at the start of the year.