giltsyield.com

Dirty price move

-£1.651

07 Aug 2026 → 09 Sep 2026

Start dirty price

£76.042

model £76.780

End dirty price

£74.391

model £75.069

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	+£0.347	The passage of time at an unchanged yield: the bond simply gets one period closer to redemption.
Rolldown	-£0.024	The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation	-£2.046	The move in the curve itself between the two dates.
Unexplained	+£0.071	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.

TR63

What moved the price

The curve, then and now

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