Shares closed at $176.19 as the S&P 500 rose 0.29% to 7,230.12 and the Dow Jones fell 0.31% to 49,499.27 in a mixed session.
The stock finished 7.57% below its 52-week high of $190.61 reached on March 30, while still outperforming Enterprise Products Partners, Kinder Morgan and Williams Cos.
Trading volume was 2.4 million shares, about 977,544 below its 50-day average of 3.3 million, suggesting lighter-than-usual activity during the decline.
Could the recent mark-to-market losses signal deeper structural risks for PSX, or are they simply short-term turbulence amid an industry boom?
As Phillips 66 invests heavily in renewables and expands globally, how might these moves reshape its risk profile and competitive edge in the next decade?