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World risk · Finance and markets · Global debt & markets

A G7 bond rout forces a central bank to buy government bonds

The test Between 26 Oct 2026 and 25 Oct 2027, the Fed, the ECB, the Bank of England, the Bank of Japan or the Bank of Canada announces unscheduled purchases of government bonds, or activates the ECB's Transmission Protection Instrument, and says it is acting against disorderly or dysfunctional bond markets.

Not under way · Confidence: medium · Reviewed 28 Oct 2026 · Scores from 1 to 10

This page answers: What could happen, how it is scored, and who is exposed?

Using this page
  1. Read the two scores: Likelihood and Impact are kept apart.
  2. Check what is happening, each fact with its source.
  3. Use the calendar for the dates to watch.

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Likelihood
4Elevated steady this month
Impact
6Elevated steady this month
Breadth6
Depth7
Duration5
Hard to substitute4
Canada pointNot added0

Impact is the average of the four parts, rounded, plus one point when Canada is directly hit on two or more channels, up to 10.

Two separate scales from 1 to 10. Strature never multiplies or merges them.

What changed

Dated, newest first

  1. US 30-year par yield 5.67% on 7 Oct, 10-year 5.31% on 5 Oct; 10-year 4.96% on 22 Oct; 5.33% and 5.00% on 23 Oct; 5.37% and 5.05% on 28 Oct [1]
  2. 28 Oct 2026: FOMC kept its range at 3.75-4%, 10-2; no purchases against disorderly markets announced [17]
  3. UK Budget 2026 and the OBR forecast published on 28 Oct 2026 [16]
  4. UK 20-year par yield 5.60% on 26 Oct 2026, the latest on the Bank's series when read on 28 Oct [2]
  5. Canada 10-year 3.90% on 21 Oct and 3.78% on 22 Oct 2026; long bond 4.10% on 22 Oct [9]
  6. UK 10-year nominal par yield 4.74% on 1 Jul, 5.43% on 8 Oct, 5.33% on 21 Oct; 20-year 5.27%, 5.79%, 5.64% [2]
Show 2 earlier changes
  1. 30-year JGB auction of 8 Oct 2026: yield at the lowest accepted price 4.121%, average 4.109% [5]
  2. France 10-year 4.48% and Germany 3.47% in September 2026; 3.89% and 3.07% in July, about 81 bp (OECD monthly) [3]

Why it matters

Long-term government bond yields across the G7 rose sharply from July to early October 2026: the US 30-year touched 5.67%, the UK 20-year 5.79% and the Japanese 30-year cleared auction at up to 4.12%. France's 10-year spread over Germany reached about 101 bp in September, a third above its one-year average. A disorderly sale that forces a central bank to buy, as the Bank of England did in 2022, would raise borrowing costs for every government, Canada's included.

Why Likelihood 4 Pushes: G7 long yields at their July-October 2026 highs, OAT-Bund spread well above its one-year average, high Brent futures prices. Brakes: yields eased from early-October highs, JGB auctions well covered, central banks holding rates high (the Fed held its range on 28 Oct [17]), TPI conditions.

Why Impact 6 Key price: the long-dated yield of the market that breaks (UK 20-year as reference).

The other facts on file (3)
  • 30-year JGB auction of 6 Aug 2026: yield at the lowest accepted price 3.952% [6] (6 Aug 2026)
  • Bank of England temporary purchases of long-dated gilts, 28 Sep to 14 Oct 2022, to restore orderly market conditions [7] (28 Sep 2022)
  • Bank of England: the 30-year gilt yield rose 160 bp in just a few days in September 2022 [13] (5 Oct 2022)

Where it sits

Bab el-MandebStrait of HormuzStrait of MalaccaPanama CanalSuez CanalTaiwan Strait11. A G7 bond rout forces a central bank to buy government bonds: Elevated impact · possible1 · Elevated impact · possibleBab el-MandebStrait of HormuzStrait of MalaccaPanama CanalSuez CanalTaiwan StraitUNITED STATESUNITED KINGDOMJAPANNORWAYFRANCEITALYPACIFIC OCEANINDIAN OCEANMap data: Natural Earth (public domain).
Bab el-MandebStrait of HormuzStrait of MalaccaPanama CanalSuez CanalTaiwan Strait11. A G7 bond rout forces a central bank to buy government bonds: Elevated impact · possibleBab el-MandebStrait of HormuzStrait of MalaccaPanama CanalSuez CanalUNITED STATESJAPANFRANCEITALYINDIAN OCEANMap data: Natural Earth (public domain).

How it spreads

If

Between 26 Oct 2026 and 25 Oct 2027, the Fed, the ECB, the Bank of England, the Bank of Japan or the Bank of Canada announces unscheduled purchases of government bonds, or activates the ECB's Transmission Protection Instrument, and says it is acting against disorderly or dysfunctional bond markets.

Not under way

Channels 4 on the card

  1. CanadaCanadian yields co-move with Treasuries; provinces and Ottawa borrow at higher rates.
  2. Government borrowingEvery G7 treasury refinances at the new yields.
  3. Banks, insurers, pensionsHolders of long bonds face losses and collateral calls, as in 2022 [7].
  4. Central banksA purchase operation cuts against tightening; the TPI is unlimited ex ante but conditional.

Sectors 1

  • Banks and insurers

Countries 7

Who is exposed

Countries
United States, United Kingdom, France, Japan, Germany, Italy, Canada
Sectors
Banks and insurers

Three scenarios and their signposts

  1. S1

    Grind higher, no break

    Yields stay high and auctions clear; central banks do not step in.

  2. S2

    A gilt or OAT break

    A UK fiscal event or a French government crisis pushes long yields up fast; the Bank of England or the ECB acts.

  3. S3

    Rally

    Lower oil cuts inflation and yields fall.

The signposts of each scenario
PathSignpost
S1No hike at the 8-9 Dec FOMC and stable gilt auctions
S2UK 20-year above 6% on the Bank of England series
S3Brent below US$90 in the IEA's next report

No probability is given for the three paths.

Dates to watch

Calendar

The dates to watch

A dot is a day, a bar a month or a year; a hollow mark is tentative. The line marks today.

  1. 5 Nov 2026 Bank of England MPC decision [10] Declared · Outside event

    Remind me

  2. 9 Dec 2026 FOMC decision with projections (8-9 Dec) [11] Declared · Outside event

    Remind me

  3. 17 Dec 2026 Bank of England MPC decision [10] Declared · Outside event

    Remind me

  4. 4 Feb 2027 Bank of England MPC decision [10] Declared · Outside event

    Remind me

Sign in, with alerts on, for an email 7 days and 1 day before.

SourceStrature world-risk card; the dates cite the sources below.
Exhibit R-3 · WORLD · strature.net

The other side

Savers, pension funds and insurers earn more on new money at 5% or more [1][2]. A central bank backstop, if it comes, caps the damage, as in 2022 [7]. Canada's lower yields (3.78% against 4.96% in the US on 22 Oct) [9][1] keep its borrowing relatively cheap.

Connected in Strature

Sources

13 sources, numbered as the text cites them

  1. Daily Treasury Par Yield Curve Rates, October 2026. US Department of the Treasury · 28 Oct 2026 · Official · confidence high · retrieved 28 Oct 2026
  2. Yield from British Government Securities, 10 and 20 year nominal par yield (IUDMNPY, IUDLNPY). Bank of England · 26 Oct 2026 · Official · confidence high · retrieved 28 Oct 2026
  3. Long-Term Government Bond Yields: 10-Year for France (IRLTLT01FRM156N). OECD via FRED · 15 Oct 2026 · International body · confidence high · retrieved 25 Oct 2026
  4. Auction Result of 30-Year JGBs on October 8, 2026. Ministry of Finance Japan · 8 Oct 2026 · Official · confidence high · retrieved 25 Oct 2026
  5. Auction Result of 30-Year JGBs on August 6, 2026. Ministry of Finance Japan · 6 Aug 2026 · Official · confidence high · retrieved 25 Oct 2026
  6. Bank of England announces gilt market operation. Bank of England · 28 Sep 2022 · Official · confidence high · retrieved 25 Oct 2026
  7. Canadian bond yields. Bank of Canada · 22 Oct 2026 · Official · confidence high · retrieved 25 Oct 2026
  8. Upcoming MPC dates. Bank of England · Official · confidence high · retrieved 25 Oct 2026
  9. Meeting calendars and information. Board of Governors of the Federal Reserve System · Official · confidence high · retrieved 25 Oct 2026
  10. Oil Market Report, October 2026. International Energy Agency · 14 Oct 2026 · International body · confidence high · retrieved 25 Oct 2026
  11. Letter from Sir Jon Cunliffe to the Chair of the Treasury Committee on the gilt market operation. Bank of England · 5 Oct 2022 · Official · confidence high · retrieved 25 Oct 2026
  12. Budget 2026 document. HM Treasury, GOV.UK · 28 Oct 2026 · Official · confidence high · retrieved 28 Oct 2026
  13. Federal Reserve issues FOMC statement. Board of Governors of the Federal Reserve System · 28 Oct 2026 · Official · confidence high · retrieved 28 Oct 2026

Reviewed 28 Oct 2026 · version 2 · last change: reviewed · All risks