This week's biggest stories are all about cost, and who ends up carrying it. Washington has reshuffled its 50% tariffs on Canadian goods while a first court challenge lands, the UK Budget has left retailers with a rates freeze that still bites and a Bank of England rate rise on the way, and an oil shock that began in the Gulf is now showing up as double-digit increases in truckload contracts. Here is what happened and what each one means for sourcing, retail and supply chain teams.

More than 100 product lines, from paint and carpets to air conditioners, join the list on 30 October, while plywood, packaging and some machinery come off. Analysts say the changes largely cancel out, but the entry date decides what you pay, and a New Jersey importer has asked the Court of International Trade to end the duties altogether. Check your classifications before the weekend.

The British Retail Consortium called the business rates announcement "smoke and mirrors", estimating that the real-terms freeze is still a 3.5% rise worth about £250 million to retailers next April. With inflation at 3.5% and the Bank of England widely expected to lift rates on 5 November, expect cost-recovery requests from suppliers.

Shippers who reset truckload contracts recently are paying about 13% more than before, and Knight-Swift says it will open its next bid season asking for low-to-mid double digits. With Hormuz traffic a fraction of normal, the cost of moving goods is unlikely to fall quickly. Rebase your fuel and freight assumptions now.

That's this week's top stories. Hit reply and let us know which of these you want us to keep tracking.