A standoff between the US and Iran pushed oil prices higher, dragging stocks and bonds lower as concerns grew that elevated energy costs could fuel inflation and lead to further Federal Reserve rate hikes. [08:04 ET] Mediators expected to hold separate talks with the US and Iran on Monday or Tuesday, with Iran's Araghchi and Qatari mediators remaining in the US - Official briefed on the negotiations [USD & WTI weakened, Index futures strengthened]