Loonie Falls to 70.7¢ U.S. as Canada-U.S. Rate Gap Widens to Largest Since Early 2025

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Canada’s dollar is ending September under renewed pressure, and the latest slide is about more than a bad day in currency markets. The loonie weakened to roughly 70.7 U.S. cents on September 25 as the gap between short-term Canadian and American bond yields widened to levels not seen since February 2025.

The move comes at an awkward moment for Canada. The Federal Reserve has raised rates as the U.S. economy remains relatively resilient, while the Bank of Canada is confronting softer domestic indicators, renewed trade uncertainty and inflation that remains above its 2% target. That combination has made U.S. assets comparatively more attractive and placed additional weight on the Canadian dollar, with consequences that can eventually reach everything from imported goods and business costs to cross-border travel.

The Loonie’s September Slide Has Accelerated

The Canadian dollar traded around C$1.4152 per U.S. dollar on September 25, equivalent to approximately 70.66 U.S. cents. It also briefly weakened to C$1.4154, its softest intraday level since July 14. The move left the loonie down roughly 1.2% for the week and heading toward a third consecutive weekly decline. It was also shaping up to be the currency’s sharpest weekly loss since March.

That may not look dramatic compared with the sudden currency swings that sometimes follow financial crises or surprise central-bank decisions, but the direction has been remarkably consistent. Bank of Canada daily averages show one Canadian dollar bought about 72.55 U.S. cents on September 8 and only about 70.74 cents by September 24. The weakening has therefore occurred over several weeks rather than in a single burst. For Canadians converting money into U.S. dollars, the difference is becoming noticeable: at an exchange rate near C$1.415 per U.S. dollar, US$100 requires roughly C$141.50 before bank or credit-card conversion charges are added.

The Two-Year Yield Gap Has Become the Main Pressure Point

One of the strongest explanations for the loonie’s weakness can be found in the bond market. On September 25, Canada’s two-year government bond yield fell roughly 153 basis points below the comparable U.S. Treasury yield. That was the widest Canada-U.S. two-year spread since February 2025. Only three days earlier, the gap had been around 148 basis points, showing how quickly the difference was widening.

Currency traders pay close attention to those spreads because investors can potentially earn a higher yield holding comparable U.S.-dollar assets. Exchange rates are influenced by many factors, including economic growth, commodity prices and political risk, but relative interest rates can become especially powerful when the difference is this pronounced. The widening spread does not automatically guarantee that the Canadian dollar will continue falling. It does, however, create an important structural headwind. Unless Canadian yields begin catching up, U.S. yields retreat, or another factor produces stronger demand for Canadian dollars, the interest-rate advantage remains firmly on the American side of the border.

The Fed and Bank of Canada Are Sending Different Signals

The bond-market gap reflects a real divergence between the two central banks. The Bank of Canada held its policy rate at 2.25% on September 2. Two weeks later, the Federal Reserve raised its target range by a quarter percentage point to 3.75%–4.00%, saying U.S. inflation remained elevated and that tighter policy would help return inflation toward its 2% objective.

Canada faces a more complicated mix of risks. Inflation is also above target, but the domestic economy has become more exposed to uncertainty surrounding U.S. tariffs and weaker activity in some sectors. The Bank of Canada has warned that higher energy costs and retaliatory tariffs could contribute to inflation, while slower growth caused by the trade conflict could pull inflation in the opposite direction. That leaves policymakers balancing two problems at once. Currency markets, meanwhile, do not have to wait for the Bank’s eventual decision. Investors can react immediately to expectations about where Canadian and U.S. rates are heading, which helps explain why the loonie can weaken even while Canadian policymakers adopt a more cautious or inflation-conscious tone.

Recent Data Have Made U.S. Assets Look Relatively Stronger

Fresh economic releases have added another layer to the currency story. Statistics Canada estimated that wholesale sales fell 1.5% in August, excluding petroleum products and oilseed and grain. The preliminary decline was driven partly by weaker agricultural-supply sales and the motor vehicle and parts industry. Statistics Canada cautioned that the advance estimate is based on an incomplete response and is more likely to be revised than its regular monthly figures.

The U.S. data released the same day were more supportive of continued business investment. Overall American durable-goods orders were essentially unchanged in August, but orders excluding transportation rose 0.3%. Measures of business equipment demand also pointed to stronger investment activity. That contrast matters because currencies often react not simply to whether an economy is growing, but to how one country is performing relative to another. If U.S. growth remains strong enough to keep the Federal Reserve concerned about inflation while Canadian activity softens, investors have another reason to expect American rates to remain comparatively high.

Canada-U.S. Trade Tensions Are Adding Another Layer of Uncertainty

Interest rates are not operating in isolation. Canada is also dealing with a renewed escalation in its trade dispute with the United States. Ottawa said in August that new U.S. tariffs would affect approximately C$27.6 billion of Canadian goods and responded with additional countermeasures. The Bank of Canada has since warned that unpredictable trade policy can discourage hiring, delay investment and undermine an economic recovery even when the direct tariff exposure appears manageable.

Governor Tiff Macklem said in September that businesses had already spent considerable time adapting to changing trade conditions by altering supply chains, finding new customers and investing in technology. That adjustment helped the economy regain momentum earlier in the year. The latest tariff escalation, however, introduced another source of uncertainty just as businesses were becoming more confident. Foreign-exchange markets dislike uncertainty when it has the potential to slow investment or weaken expected returns. A prolonged Canada-U.S. dispute therefore matters to the loonie not only because tariffs alter trade flows, but because they can influence growth expectations and, in turn, expectations for future Bank of Canada policy.

A Weaker Dollar Eventually Reaches Canadian Consumers and Businesses

For households, currency movements can seem distant until they appear in everyday prices. A weaker Canadian dollar raises the Canadian-dollar cost of products, components and services priced internationally in U.S. dollars. The pass-through is not immediate or uniform. Retailers can absorb part of an exchange-rate change in their profit margins, contracts may lock in prices temporarily, and companies often hedge their currency exposure. Bank of Canada research has nevertheless documented the connection between exchange-rate movements and import prices.

The exposure remains significant even after years of trade diversification. Statistics Canada reported that the United States accounted for 58.8% of Canadian merchandise imports in 2025, down from 62.3% a year earlier. Canadians can therefore feel a weaker loonie through imported machinery, parts, consumer products and travel costs. Businesses relying on U.S.-dollar inputs face similar pressure. There is another side to the equation: Canadian exporters receiving U.S.-dollar revenue can become more competitive or earn more Canadian dollars when those revenues are converted back home. The currency’s decline consequently creates both winners and losers rather than functioning like a simple economy-wide tax.

Oil Is Helping Canada, but It Has Not Been Enough to Rescue the Currency

Canada’s status as a major energy exporter has historically given the loonie a close relationship with oil prices. The reason is straightforward: higher energy export revenues can increase demand for Canadian dollars and strengthen Canada’s trade position. The scale remains enormous. Canadian energy regulators reported that crude oil, refined petroleum products, natural gas and natural-gas liquids exported to the United States were worth approximately C$157.5 billion in 2025, equal to more than one-fifth of Canada’s total goods exports worldwide.

Yet oil has recently failed to overpower the interest-rate story. U.S. crude futures fell about 2.6% to roughly US$92.17 a barrel on September 25 as markets weighed developments in the Middle East. Earlier in September, crude had traded above US$100 as supply concerns intensified. Normally, such elevated prices might provide substantial support for the Canadian currency. The fact that the loonie has still weakened illustrates how dominant U.S. interest rates, the stronger American dollar and trade uncertainty have become. Commodity strength can cushion Canada’s currency, but it cannot always offset a large and widening yield disadvantage.

The Next Few Weeks Could Decide Whether 70¢ Becomes a Bigger Story

Canada’s next major monetary-policy clues will arrive quickly. Statistics Canada reported that consumer prices were 3.0% higher in August than a year earlier, unchanged from July. Excluding gasoline, inflation was 2.4%. Transportation prices were up 7.5% year over year, reflecting the effects of elevated energy costs, while gasoline prices were 22.8% higher. Those numbers leave the Bank of Canada little room to ignore inflation even as concerns about trade-sensitive parts of the economy continue to build.

September CPI is scheduled for October 19, followed by the Bank of Canada’s next interest-rate decision and Monetary Policy Report on October 28. Those releases could become critical turning points for the loonie. Evidence that inflation is becoming more persistent could strengthen expectations for tighter Canadian policy and potentially narrow the rate disadvantage. Sharper signs of economic weakness could have the opposite effect. For now, the important number is not simply 70.7 cents. It is the roughly 153-basis-point two-year yield gap sitting behind it—and whether that unusually wide difference begins to close or keeps pulling the two currencies farther apart.

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