What mattered on Tuesday, 18 August 2026

Canada's 50% tariff takes effect tomorrow — today is the last business day to act, not to forecast

Roughly C$28 billion of annual exports lose their exemption on 19 August; fix pricing, contracts and inventory today rather than waiting for a deal that has not materialised.

A projectile strike on a transiting vessel puts Brent above $91 and ends the idea that only state tankers are targets

Every hull in the strait now carries war risk; build fuel, freight and insurance budgets on a sustained $90-plus band rather than on a reopening.

The 30-year Treasury at a 19-year high means the cost of long money has moved independently of the Fed

Deficits, issuance and foreign selling — not policy rates — are setting long-term borrowing costs; re-run every capital plan and refinancing at 5.31%.

Washington is cutting exercises with Seoul because the Iran war is consuming carriers — one theatre is now paying for another

Treat allied security guarantees in Asia as a variable input to Asian operations and supply decisions, not a fixed background condition.

637 drones over Moscow and a Russian warning to Britain show deep strike is now routine on both sides

Warehouses, power supply and logistics inside Russia are live targets, and a NATO state has been named as a party — price European infrastructure and energy risk accordingly.