Ero Copper is trading at $29.79, down 4.27%, in pre-market on October 30; no clear company-specific announcement explains the decline. - Third-quarter results are scheduled for November 2 after market close. - Broader risk-off sentiment may be weighing on shares, with U.S. futures lower amid technology-led selling and weaker Asian markets. - Copper-market concerns were cited alongside Ero Copper’s prior-session decline, but no direct overnight link is established.