OEF is trading at $379.08, down 1.52%, as broad risk-off trading weighs on U.S. stocks. - OEF tracks 100 large U.S. companies, and no OEF-specific catalyst surfaced. - Reuters reported U.S. indexes opened lower amid oil-price concerns and renewed doubts about AI spending. Bloomberg cited Middle East tensions, higher oil and inflation fears pressuring U.S. futures. - Trading is live; volume or activity-level data was not provided.