All four major North American indices closed higher Thursday as Treasury yields retreated from a 19 year high, but the size of the move split cleanly along a line that matters for Canadian portfolios.

Two central banks read the same energy-driven inflation data this week and reached opposite conclusions about whether it will last. Thursday sided with the one that held.

Energy names gained on crude above 100 dollars a barrel, but the broader index still closed lower after the Federal Reserve raised rates for the first time since 2023.

A hawkish Fed hike hit Wall Street and TSX financials the same day Ottawa and Brussels moved to deepen trade and defence ties.

Energy strength from the Hormuz-driven oil rally is fighting a three-week slide in base metals, financials, and technology, with a near-certain Federal Reserve hike this afternoon adding a fresh cross-current.

The index closed at 35,703.47 on September 14, down from a late-August high of 36,957.63, despite Canadian Natural Resources, Tourmaline and Suncor all posting gains through the same stretch. Technology weakness and a jittery run-up to Wednesday's Fed decision are absorbing more than energy is contributing.

The Saudi East-West pipeline was Riyadh's answer to the Hormuz closure, a 4 to 5 million barrel-a-day route to the Red Sea that did not need the Strait at all. Drone strikes shut it down September 10 and 11. The mechanism from there to Canadian portfolios is direct and already visible.

The S&P/TSX Composite closed at 35,697.49 on September 11, down 3.7 percent from its August high, even as WTI settled above $100 a barrel for the second time in a week.

WTI crude closed at $102.55 on September 13, the day an Iranian vessel was struck near Qeshm, and the chain from the Strait of Hormuz to Canadian portfolios runs through gasoline prices, energy equities, and the currency.

The Bank of Canada held for a seventh straight decision while Fed hike odds climbed past seventy per cent, both reacting to the same barrel of oil that also pulled the TSX to a six-week low even as Canadian energy names rallied around it.

The oil-driven CPI shock and the TSX afternoon rebound on Friday are not two separate stories. They are the same number, working in opposite directions inside one trading session, while the Bank of Canada arrives at the identical conclusion through its own tariff-driven channel.

The S&P/TSX Composite closed at 35,616.77 on Thursday, down 0.81 per cent, as a U.S. procurement threat hit Canadian engineering and infrastructure names hard enough that a surging oil price could not offset the damage.

WTI crude closed at $102.48 on September 10, up 25 per cent since mid-August, as U.S. strikes on Iranian tankers and Iranian retaliation against ships using unauthorized routes have cut Hormuz traffic by more than a third.

The composite closed at 35,906.56 Wednesday, down 0.6% and in its fourth decline in five sessions, even as WTI crude climbed toward $100 on the tanker war.

WTI is up 18% in thirteen sessions as the tanker war escalates, and the same headlines pulling clients toward energy are the pattern Barber and Odean’s research says loses money.

A war escalation and a trade fight pulled Canadian portfolios in opposite directions today. The Government of Canada 10-year yield did not move enough to say which one the bond market believes.