Long-term Government of Canada yields have settled above 4%, and that backdrop frames the 3.5% bond maturing on 1 December 2056. As at 15 September 2026 the bond traded near 86.625% of face value, with an approximate current Yield of about 4.04% and a yield to Maturity of 4.299%. With roughly 30 years still to run, its price reflects the arithmetic of a coupon set below prevailing ultra-long yields. This article examines why the bond sits at a milder discount than some peers and what may shape its path from here.

What is this bond?

CA135087T875 is a nominal Government of Canada bond paying a fixed 3.5% annual coupon and maturing on 1 December 2056. The coupon is calculated on a Face Value of 100, so a holder receives C$3.50 per C$100 of nominal each year, paid semi-annually, until the government repays the C$100 face at maturity. The coupon does not change with market conditions.

As a federal obligation, the bond carries Canada’s sovereign ratings of S&P AAA, Moody’s Aaa and Fitch AA+. Its 3.5% coupon is closer to today’s long-term yields than the lower coupons on some older long bonds, which is why it trades at a shallower discount. Against the Bank of Canada’s long (30-year) benchmark yield of 4.28% on 11 September 2026, a 3.5% coupon still falls short, and the price reflects that gap.

Why is this bond in focus?

The bond matters because of what it reveals about the very long end of the curve. A 30-year maturity carries enormous interest-rate sensitivity, so its price moves sharply when long yields shift. With yields above 4% and its coupon at 3.5%, the bond is a clean example of how the market discounts a below-market coupon over three decades.

It is not an official benchmark. The current 30-year/long Government of Canada benchmark is the neighbouring 3.5% December 2057 bond (CA135087S703), effective 6 March 2026. The 2056 issue is off-the-run — actively traded but not the reference security for new long-end pricing.

What are Canadian bond yields doing?

The Government of Canada curve was positively sloped as at 11 September 2026, with Bank of Canada benchmark yields rising from 3.35% at two years to 3.95% at ten years and 4.28% at the long end. That upward slope reflects a normalisation from the inversion of 2023-24.

For a 2056 maturity, the long benchmark near 4.28% is the anchor. The bond’s own yield to maturity of 4.299% (15 September 2026) sits essentially in line with that long-end level, confirming that its price reflects prevailing ultra-long yields.

Interest rates and the Bank of Canada

The Bank of Canada held its overnight rate target at 2.25% at the 2 September 2026 decision, with the Bank Rate at 2.50% and the deposit rate at 2.20%. The 2.25% level is viewed as within the estimated neutral range after earlier cuts. Governing Council said it stands “prepared to adjust Monetary Policy as needed,” assessing the sustainability of the rebound and the Inflation outlook without pre-commitment.

For a 30-year bond, the overnight rate is only an indirect influence. It anchors the front of the curve, but the price of the 2056 bond depends far more on long-term expectations for inflation, growth and the term premium — the extra yield investors Demand for locking money away for decades.

Inflation and the economic backdrop

Statistics Canada put headline CPI at 3.0% year on year for August 2026 (released 14 September 2026), unchanged. Core Inflation was softer, with CPI-trim and CPI-median both at 2.0%, near the target midpoint. Elevated gasoline, up 22.8% year on year, kept headline above core; CPI excluding gasoline ran around 2.4%.

On growth, real GDP rose 3.3% annualised in the second quarter of 2026, and the Unemployment rate edged down to 6.4% in August 2026, though the Bank still called labour demand subdued. For a bond maturing in 2056, the decisive issue is whether inflation stays anchored near 2% over the long haul, since that shapes the real value of fixed coupons far into the future.

Coupon versus market yield

Separating coupon from yield is essential. The 3.5% coupon is fixed on the C$100 face and never varies. The Market Price — about 86.625% of face on 15 September 2026 — moves with prevailing yields. Because the coupon sits below the roughly 4.3% yield investors now require at the long end, buyers hold the bond only at a discount that closes the gap.

The approximate current yield of 4.04% divides the coupon by the discounted price. The yield to maturity of 4.299% adds the pull-to-par: as 2056 approaches, the price is expected to drift back toward 100, and that gradual Capital accretion is counted alongside the coupons. The discount is milder here than on lower-coupon long bonds precisely because 3.5% is nearer today’s yields — less ground to make up on price. A discount reflects coupon-versus-yield arithmetic, not an appraisal of value.

What could move this bond next?

Long-term yields are the primary driver. Shifts in inflation expectations, the term premium and global ultra-long yields feed straight into the price of a 30-year bond. Supply matters too: the Department of Finance plans gross bond issuance of about C$298 billion for 2026-27, against a federal Deficit near C$50 billion (about 1.4% of GDP), keeping steady long-bond supply in the market.

Key risks to watch

Duration risk is paramount. A rise in long yields would reduce the price sharply, amplified by the 30-year term. Inflation surprises, a wider term premium, heavier issuance and moves in global long yields all pose downside price risks; falling long yields would lift the price. As an off-the-run line, the bond may trade with less Liquidity than the current long benchmark.

What investors may watch next

The Bank of Canada’s next decisions fall on 28 October 2026 (with a Monetary Policy Report) and 9 December 2026. Investors will also track coming CPI and GDP data, the long benchmark yield and the federal borrowing programme, each of which influences where ultra-long yields, and this bond’s price, settle.