giltsyield.com

Dirty price move

-£3.330

07 Aug 2026 → 09 Sep 2026

Start dirty price

£99.448

model £99.427

End dirty price

£96.117

model £95.953

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	-£1.858	The passage of time at an unchanged yield: the bond simply gets one period closer to redemption.
Rolldown	+£0.054	The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation	-£1.684	The move in the curve itself between the two dates.
Unexplained	+£0.157	The residual between the traded prices and what carry, rolldown and variation account for.

The curve, then and now

Market data as of 07 Aug 2026 and 09 Sep 2026.

T35

What moved the price

The curve, then and now

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