Atomera is trading at $2.58, down 9.44%, as semiconductor stocks retreat amid concerns that tighter AI data-center regulation could slow construction. - Reuters reported losses across chip and data-center-related stocks as the concerns weighed on the Nasdaq, alongside weakness after Qualcomm’s smartphone-chip sales missed estimates. - Major indexes were sharply lower, supporting a broad risk-off backdrop. - No clear company-specific announcement was identified for November 5; the company’s recently reported quarterly results are prior context, not a new catalyst.