giltsyield.com

Return

+£2.290

12 Oct 2026 → 12 Nov 2026

Start dirty price

£87.616

model £87.496

End dirty price

£89.906

model £89.909

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	+£0.419	The passage of time at an unchanged yield: coupons earned plus the bond getting closer to redemption.
Rolldown	+£0.037	The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation	+£1.957	The move in the curve itself between the two dates.
Unexplained	-£0.123	The residual between the traded prices and what carry, rolldown and variation account for.

The curve, then and now

Market data as of 12 Oct 2026 and 12 Nov 2026.

T40

What moved the price

The curve, then and now

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