OIH is trading 3.04% down at $354.92, with oilfield-services shares pressured by a sharp drop in crude prices. - No company-specific announcement explaining the move surfaced in the available search. - Reuters reported Brent fell nearly 9% overnight on November 5 as markets reassessed the likelihood of reduced Iran-war escalation and recovering supply. - Major U.S. indexes were sharply lower, and energy-sector weakness was also flagged; available evidence points to sector and market forces rather than an OIH-specific catalyst.