Shell is trading at $99.81 (+3.06%) with rising Brent providing an oil-sector tailwind amid tanker attacks in the Strait of Hormuz. - Brent climbed $2.28 to $102.28/bbl as attacks reached their highest weekly level since the Iran war began. - Shell’s October 7 update reported a $42/bbl Q3 refining margin, up from $24/bbl in Q2; it did not directly link the update to the share move. - U.S. indices were modestly lower, so broad-market strength does not explain the gain.