A published RPI number feeds the index ratio that scales an index-linked gilt's coupons and repayment, and the report for 21 May 2026 shows the day's nominal yields and the day's implied RPI without any claim about when a print was released.
The chain from a printed number to a coupon
An index-linked gilt pays a real coupon that is fixed at issue, and the cash it actually pays is that real coupon scaled by an index ratio. The index ratio measures how far the relevant price index has risen since the gilt was issued, and it is quoted against published RPI. When a new RPI figure is published, the index ratio moves, and with it the estimated cash value of every future coupon and of the redemption payment. That is the whole chain: a published number enters the index ratio, and the index ratio scales the gilt's cash flows.
It is worth separating two things a reader meets here. The index ratio is a fact about the published index; the cash it produces is an income estimate rather than a contractual amount, because future coupons will be scaled by future index ratios that are not yet known. An estimate assumes no further inflation beyond the latest published figure, so it is the coupon as things stand, not a promise of the coupon to come.
What the report for 21 May 2026 recorded
The stored report for 21 May 2026 records a mixed day in conventional yields. The nearest conventional gilt to two years' maturity stood at a gross redemption yield of 4.139%, up 1.1 basis points on the previous report, while the nearest to five, ten and thirty years' maturity fell by 0.9, 3.1 and 2.7 basis points. Of the conventional gilts the report priced, sixty-seven fell and three rose, so the day was mostly a fall at the belly and the long end with a small rise at the very short end. The index-linked pages carry the same day's real yields and estimates.
| Nearest to | Reported gross yield | Change since previous report |
| 2 years | 4.139% | +1.1 bp |
| 5 years | 4.364% | −0.9 bp |
| 10 years | 4.895% | −3.1 bp |
| 30 years | 5.651% | −2.7 bp |
What the day's inflation pricing showed
The same report carries an implied RPI for each index-linked gilt. On 21 May 2026 the thirty-four linkers that carried one showed an average implied breakeven of 353 basis points, with a shortest-dated figure of 476 and a longest-dated of 332. The average was close to where it had been on the surrounding reports, so the small fall in nominal yields at the belly and the long end did not come with a large change in what the market was pricing for inflation: most of the day's move was in the real yield rather than in inflation expectations.
| Measure | Value on 21 May 2026 |
| Average implied breakeven | 353 bp |
| Shortest-dated breakeven | 476 bp |
| Longest-dated breakeven | 332 bp |
| Index-linked gilts carrying one | 34 |
Reading a print into a price, carefully
Two ideas are easy to run together and are better kept apart. The first is what a published RPI number does to the index ratio and therefore to the estimated cash a linker pays — that is arithmetic and it follows a print mechanically. The second is what the market does to a linker's price when it reprices inflation, which is a movement in the implied RPI and the real yield and can happen on a day with no print at all. A print moves the estimate; the market moves the price. This note records the market side for 21 May 2026 and makes no claim that a release happened on or near that date.
For a reader holding or following a linker, the practical link is the one the site makes between the estimate and the calendar: the income calendar places the coupon payments on their dates, and the index ratio behind each estimate is what a new print would restate. The two together answer what a linker is expected to pay and when, without turning an estimate into a promise.
An income estimate is not a contractual amount. It scales the real coupon by the latest published index ratio and assumes no further inflation; a future print will change it.
Background, not advice
This article explains how a published index reaches an index-linked gilt's cash flows, and reads one stored report; it is general background, not investment, tax or legal advice for any reader's circumstances. The figures are those the report for 21 May 2026 published and say nothing about a later print or the next session. The primary source for an index ratio, an estimate or a real yield is the day's report and the Office for National Statistics' own release.