The sector was riding high – with Xpeng Inc.’s year-to-date gain exceeding 130 per cent earlier this month. But signs of pressure at even established firms like BYD Co. have raised new questions​The sector was riding high – with Xpeng Inc.’s year-to-date gain exceeding 130 per cent earlier this month. But signs of pressure at even established firms like BYD Co. have raised new questions ​Latest News [ SOBAN NEWS: International and National ]