BYD Company's stock plummeted 5.01% during intraday trading on Monday, reflecting broad selling pressure in the automobile sector.

The decline was driven by multiple factors including sector-wide weakness, concerns over BYD's global expansion timeline after reports of further delays at its Hungary factory, and internal restructuring plans that may pressure margins. Additionally, geopolitical tensions escalated as the U.S. recently added BYD to a list of companies accused of aiding Beijing's military, prompting Chinese retaliatory export controls. Further regulatory concerns emerged from an investigation into alleged environmental violations at BYD's Hungary construction site, though the company has denied the claims.

Despite a recent target price upgrade by UBS, capital flow data indicated sustained net outflows from the stock, contributing to the downward pressure.