giltsyield.com

Dirty price move

-£0.632

21 Aug 2026 → 21 Sep 2026

Start dirty price

£99.999

model £100.068

End dirty price

£99.366

model £99.456

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	+£0.354	The passage of time at an unchanged yield: the bond simply gets one period closer to redemption.
Rolldown	+£0.047	The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation	-£1.026	The move in the curve itself between the two dates.
Unexplained	-£0.008	The residual between the traded prices and what carry, rolldown and variation account for.

The curve, then and now

Market data as of 21 Aug 2026 and 21 Sep 2026.

T32H

What moved the price

The curve, then and now

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