BP p.l.c. is trading 4.5% down at $510.70 today, largely influenced by a significant drop in oil prices. - Oil prices, including Brent crude, have tumbled to just over $82 a barrel after reports of a US-Iran peace deal to reopen the Strait of Hormuz, causing crude to slip over 4%. - Additionally, BP has begun the process of selling stakes in two Gulf of Mexico projects.