TG39

0 1/8% Index-linked Treasury Gilt 2039 · GB00BLH38265

Dirty price move

-£1.074

07 Aug 2026 → 09 Sep 2026

Start dirty price

£53.565

model £53.565

End dirty price

£52.491

model £52.491

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	+£0.226	The passage of time at an unchanged yield: the bond simply gets one period closer to redemption.
Rolldown	+£0.040	The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation	-£1.348	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 07 Aug 2026 and 09 Sep 2026.

TG39

What moved the price

The curve, then and now

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