Banks and miners fell, energy rose, and a semiconductor selloff that started in the US spread to South Korea overnight.

Financials and technology carried the index to 36,759.29 while energy lagged and breadth stayed tight, even as bond yields hit a two year high.

Canadian energy and industrial strength pushed the TSX composite to 36,475.92 on Tuesday, even as the Dow, S&P 500, and Nasdaq all closed lower on fading Hormuz optimism.

WTI and Brent jumped roughly 4 percent as Washington and Tehran each pointed to the naval blockade as the actual obstacle, a sharper claim than either side has made in weeks. Gold barely moved and the Canadian dollar stayed flat, leaving the loonie without the lift its own yield advantage and oil's rally would normally provide.

Gold miners carried the index to 36,381.23 while banks lagged on BoC risk. Monday's early tape already shows oil reclaiming the leadership gold held Friday.

Celestica surged 9.5% and Constellation Software jumped 6.4% as the TSX closed at a third straight record Tuesday, while Cenovus and the gold miners lagged. Overnight, WTI reversed hard on Iran's missile attack, flipping the exact sector split that built Tuesday's record.

The TSX fell 0.82% a day after a record close, as oil past $100 lifted energy but hit yield-sensitive banks. Energy and utilities were the only sectors to gain.

Energy led Monday's TSX sector split as crude touched a five week high, but Tuesday's mediation driven pullback in oil is the first real test of whether that leadership holds.

The alleged U.S. strike on Iran's under-construction Darkhovin nuclear facility is a different category of target than anything hit in the previous five months of this conflict, and the IAEA's finding, not Monday's oil price, is the variable that tells Canadian portfolios which of two paths this war takes next.

The S&P/TSX Composite closed at 35,416.20 Wednesday, its third straight gain, as Canadian energy producers rallied on the Hormuz-driven oil surge while the index's gold miners, led by an 8.4 per cent drop in Franco-Nevada, absorbed the other side of the same trade.

For four months, Iran's leverage was a shipping lane. Wednesday's threat to halt energy exports from the entire region, paired with a strike that hit actual production infrastructure, changes the mechanism connecting this war to Canadian portfolios, even though the base case has not changed yet.

The TSX gained 0.76% Thursday to 35,200, led by gold miners and the banks, even as the Iran conflict widened to two new countries. Why a U.S. chip rally and easing bond yields did the real work, and what a five-week, 613-point trading range says about Canadian equity exposure.

A single Iran headline pushed oil up and bond yields up at the same time, splitting the index into a clear winner and a clear group of losers underneath a headline decline of just under one percent.

Twelve major asset classes moved on Wednesday, and the direction split cleanly along exposure to the conflict. Professional analysts call it a downgrade in confidence, not a resolved crisis.

WTI's jump to $74.35 lifted Methanex, South Bow, and ARC Resources more than 4% while HudBay Minerals and Energy Fuels fell over 6%, a split that says more about currency and sub-sector mechanics than about the price of oil itself.

Energy and materials led Monday's pullback in Toronto while AI-driven buying pushed the Dow to a record close in New York. Tuesday's shipping attack in the Strait of Hormuz has barely moved oil, leaving Canadian energy names to open into the same soft price that pressured them Monday.