T31H

4 1/8% Treasury Gilt 2031 · GB00BVP99673
From To
Return
+£0.723

12 Oct 2026 → 12 Nov 2026

Start dirty price
£96.930
model £97.061
End dirty price
£97.653
model £97.760
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 +£0.406 The passage of time at an unchanged yield: coupons earned plus the bond getting closer to redemption.
Rolldown +£0.027 The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation +£0.266 The move in the curve itself between the two dates.
Unexplained +£0.024 The residual between the traded prices and what carry, rolldown and variation account for.

The curve, then and now

Market data as of 12 Oct 2026 and 12 Nov 2026.
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