Canadian Dollar at an 18-Month Low as Oil Falls: When the Commodity Link Fails

Key takeaways

1. USDCAD touched 1.4293 on Monday, the Canadian dollar's weakest since April 2025, as the US dollar firmed and US crude settled 1.8% lower at $89.43 (Reuters).

2. Oil fell after a G7 pledge to release 100 million barrels from emergency reserves, yet the loonie's weakness was driven mainly by events in Europe; Tuesday's C$4.2 billion August trade surplus, above C$1.30 billion to C$1.5 billion forecasts, reflected US-bound shipments and lower vehicle imports as well as higher energy exports (Statistics Canada).

3. Commodity-currency correlations are unstable; position size should reflect the chance that several drivers move against you at once.

The development

The Canadian dollar weakened to an 18-month low against the US dollar on Monday 5 October. USDCAD touched 1.4293, its highest since April 2025, before trading around 1.4257 (Reuters). An RBC Capital Markets strategist told Reuters the move was dictated largely by developments in Europe, as broad US dollar strength followed the euro's slide.

Domestic news added little support. S&P Global's Canada services PMI rose to 48.3 in September from 46.8 but stayed below the 50 line that separates expansion from contraction, marking a fourth month of decline.

On Tuesday, Statistics Canada reported that the merchandise trade surplus widened to C$4.2 billion in August from C$787 million in July, well above published forecasts of C$1.30 billion and C$1.5 billion. Exports rose 2.5% and imports fell 2.0%. Energy exports rose 4.7%, the first increase since April, with refined petroleum products up 17.4% and crude oil up 2.1% on higher prices. Exports to the United States rose 8.1% ahead of new US tariffs that took effect at the end of August, while imports of motor vehicles and parts fell 8.8% (Statistics Canada, 6 Oct). Oil, one of Canada's major exports, also fell: US crude futures settled 1.8% lower at $89.43 a barrel, and Brent was near $100 in Asia on Tuesday (Reuters).

The oil move followed a G7 leaders' statement on 2 October committing to a coordinated release of 100 million barrels through the International Energy Agency over four months, including a front-loaded diesel release (G7 statement). Middle East exports had also increased, although supply risks around the Strait of Hormuz remain. Speculators raised net short positions in the Canadian dollar to 78,671 contracts as of 29 September, from 53,210 a week earlier (CFTC data via Reuters).

Market transmission

The loonie is often described as an oil currency, but that link works only when oil is the dominant driver. This week, three forces lined up against the Canadian dollar at once: broad dollar demand from European risk, softer oil, and weak domestic activity. When independent drivers point the same way, moves can extend further than any single factor would justify. The August trade data showed the link is looser than the label suggests: energy export values rose, but the surplus also reflected tariff-related shipments to the US and a drop in vehicle imports, drivers that have little to do with the oil price.

Positioning adds a second layer of risk. A growing short position means many participants already hold the same view. If one driver reverses, for example an oil spike on a new supply disruption, crowded positions can unwind quickly.

What to monitor next

• Whether the C$4.2 billion surplus holds once September data capture the US tariffs that took effect at the end of August (next release 4 November, Statistics Canada); see Note 4 on the forecast range.

• The September Ivey PMI, scheduled for 14:00 UTC on Tuesday.

• Headlines on Gulf shipping and the IEA's progress on the G7 release.

• Whether USDCAD tracks oil or tracks EURUSD during the European session.

Reusable lesson

Before relying on a historical correlation, check whether it is currently active. Compare the currency's moves with its usual driver over recent sessions. If the link has weakened, a trade built on that relationship carries more risk than its history suggests, and professionals typically reduce size rather than change their view.

Invalidation and risk

Geopolitical events can reverse oil prices abruptly; attacks on Gulf energy infrastructure have been reported in recent days. A recovery in the euro would remove the main source of US dollar demand. Statistics Canada data or Bank of Canada commentary could also shift the domestic story.

Glossary

Commodity currency: A currency whose value tends to move with the price of a country's major export, such as oil for the Canadian dollar.

Net short position: When speculative traders hold more contracts betting on a currency's fall than on its rise.

Correlation: A statistical measure of how closely two prices move together; it can change over time.

Sources

Statistics Canada (2026-10-06): Canadian international merchandise trade, August 2026 (The Daily): surplus C$4.2bn (July C$787m); exports +2.5%, imports -2.0%; energy exports +4.7%. https://www150.statcan.gc.ca/n1/daily-quotidien/261006/dq261006a-eng.htm

Reuters (via MarketScreener) (2026-10-05): Canadian dollar hits 18-month low as France worries boost greenback

G7 Leaders (Council of the EU) (2026-10-02): G7 Leaders' Statement on global energy security and market stability

Reuters (via Investing.com) (2026-10-06): Asian shares track Wall Street higher, Treasury yields near multi-decade highs

Reuters (via Euronext) (2026-10-05): Oil slips on rising Mideast crude exports, G7 stocks release

FXStreet (2026-10-06): Japanese Yen steadies amid expansionary fiscal plans, rate hike uncertainty (Houthi strike reports)

Disclaimer

This note is provided by the SummitFx Project for general education and market context only. It is not investment advice, not a solicitation to buy or sell any instrument, and not a personal recommendation. Foreign exchange and related markets are leveraged and can result in the loss of some or all of your capital. Figures are believed accurate at the time of research and may already be stale. Always verify live prices, official releases, and your own risk limits before acting. Past market behaviour does not determine future results.