Phillips 66 Chairman and CEO Mark Lashier issued a clear warning on June 24, 2026, at the Reuters Global Energy Forum in New York: refining and petrochemical earnings face greater volatility due to ongoing uncertainty from disruptions in the Strait of Hormuz. Lashier highlighted how uncertainty in crude supply and shipping lanes causes refining margins (crack spreads) to swing sharply in both directions. This shifts the story from simple crude p…