** Hong Kong shares of BYD Co 1211.HK slip 3.6% to HK$109.4, on course for the biggest one-day pct fall since September 1
** Stock hit its lowest level since September 16, and is on track to snap five straight sessions of gains
** Second-biggest pct loser on Hang Seng Tech Index .HSTECH and Hang Seng Automobile Index .HSAMI, which are down 1.2% and 0.9%, respectively
** Shenzhen-listed stock 002594.SZ slips 1.8% to 107.15 yuan, the lowest level since September 15
** Warren Buffett's Berkshire Hathaway BRKa.N has fully exited Chinese automaker BYD, a filing showed, ending a 17-year investment that grew over 20-fold in value in that period
** The filing by Berkshire's energy subsidiary recorded the value of its BYD investment as zero as of end-March, down from $415 million at the end of 2024
** Berkshire did not immediately respond to a request for comment on Monday
** YTD, BYD Hong Kong stock up 23.3%, Shenzhen-listed shares up 14%