Warren Buffett-backed BYD stock Posts Record Quarterly Profit as Chinese Buyers Flock to Affordable EVs BYD ($BYDDF) the world's largest electric vehicle EV maker and backed by legendary investor Warren Buffet, has just shattered records with its latest earnings report. The Shenzhen-based carmaker reported a 12-fold profit growth to 7.3 billion yuan (US$1.06 billion) in the three months to December, compared to 602 million yuan a year earlier. This surge in profit was driven by a 156.7% jump in sales to 683,440 units, as mainland Chinese buyers lapped up BYD's value-for-money EV models.