NioCorp Developments is trading at $0.64, down 9.9%, amid materials-sector pressure; no company-specific announcement explaining the September 28, 2026 move was found. - The company’s latest listed releases are dated August 10; its September 28 earnings date is an estimate, not a reported result. - Materials stocks are under pressure amid higher yields, rising oil prices, and a risk-off backdrop; the supplied sector context reports materials down 1.55%.