T31

4% Treasury Gilt 2031 · GB00BPSNBF73
From To
Return
+£0.472

14 Oct 2026 → 13 Nov 2026

Start dirty price
£95.443
model £95.439
End dirty price
£95.915
model £95.916
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 +£0.416 The passage of time at an unchanged yield: coupons earned plus the bond getting closer to redemption.
Rolldown +£0.030 The yield change that comes from the shorter remaining maturity — rolling down the same curve.
Variation +£0.031 The move in the curve itself between the two dates.
Unexplained -£0.005 The residual between the traded prices and what carry, rolldown and variation account for.

The curve, then and now

Market data as of 14 Oct 2026 and 13 Nov 2026.
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