Oil prices slip amid Iran negotiation uncertainty. West Texas Intermediate futures fell 1.1% to $88.60 per barrel Tuesday as mixed signals emerged from U.S.-Iran peace talks ahead of a ceasefire deadline. Vice President JD Vance is set to lead U.S. negotiations in Pakistan, but Iran's parliamentary speaker rejected talks under threats, stating the country has prepared new battlefield responses. President Trump threatened overwhelming military action if no agreement is reached before Tuesday evening's deadline. Brent crude slipped 0.6% to $94.89 per barrel after both benchmarks surged over 5% Monday. The Strait of Hormuz disruption continues tightening global supply. Rystad Energy warned that sustained $100 oil could unlock 2.
