T41

0 1/8% Index-linked Treasury Gilt 2041 · GB00BGDYHF49

Return

-£0.213

04 Sep 2026 → 02 Oct 2026

Start dirty price

£109.036

model £68.254

End dirty price

£108.824

model £67.343

Mark-to-market is the traded price; mark-to-model discounts the remaining flows along the fitted curve. The decomposition below is computed on the model prices.

What moved the price

Effect	Contribution	What it is
Carry	+£0.702	The passage of time at an unchanged yield: coupons earned plus the bond getting closer to redemption.
Rolldown	+£0.043	The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation	-£1.656	The move in the curve itself between the two dates.
Unexplained	+£0.698	The residual between the traded prices and what carry, rolldown and variation account for.

The curve, then and now

Market data as of 04 Sep 2026 and 02 Oct 2026.

T41

What moved the price

The curve, then and now

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