Hesai Group is trading 4.16% down at $13.12 in pre-market, with no clear company-specific catalyst identified for the October 27, 2026, decline. - No new company-specific announcement or clear overnight catalyst surfaced in the available search results. - The next scheduled earnings report is November 10; the recent Physical AI discussion accompanied the prior session’s rise, not this drop. - Major U.S. indices were near flat, offering no clear broad-market explanation.