giltsyield.com

Return

+£0.050

28 Aug 2026 → 25 Sep 2026

Start dirty price

£94.601

model £94.306

End dirty price

£94.650

model £94.301

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	+£0.310	The passage of time at an unchanged yield: coupons earned plus the bond getting closer to redemption.
Rolldown	+£0.012	The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation	-£0.326	The move in the curve itself between the two dates.
Unexplained	+£0.054	The residual between the traded prices and what carry, rolldown and variation account for.

The curve, then and now

Market data as of 28 Aug 2026 and 25 Sep 2026.

TN28

What moved the price

The curve, then and now

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