UK 30-year gilt yield tops 6% as global bond sell-off deepens

The UK 30-year gilt yield rose above 6% on Thursday, 1 October, reaching its highest level since 1998 as a global bond sell-off put renewed pressure on British government borrowing ahead of this month's budget. Reuters reported an intraday high of 6.029%, citing LSEG data. A higher yield means investors are demanding a greater return to hold the debt; the move does not by itself establish what the government will pay on future borrowing.

The rise extends the bond-market pressure covered in NewsJaws' earlier report. Reuters said the 30-year yield was up six basis points on the day and had not been this high since January 1998. The Guardian also reported that the yield crossed 6% for the first time since 1998. Those are intraday figures, rather than a closing rate.

How far UK gilt yields rose

Pressure reached beyond the longest-dated bonds. Reuters reported that the 10-year gilt yield rose eight basis points to 5.510%, its highest since July 2007. It said five-year gilt yields reached their highest level since July 2008. The moves across maturities show that investors were repricing more than one part of the government's debt market on Thursday.

The sell-off was international. The Guardian reported that US 10-year Treasury yields reached their highest level since 2002 on Wednesday, while Japan's 10-year yield moved towards a 30-year high set the previous month. Reuters said Thursday's UK rise was sharper than the move in comparable German Bunds. Those comparisons place the gilt move in a wider market decline while also showing particular pressure on British debt.

Why investors are concerned about inflation and debt

The Guardian reported that investors were concerned persistent oil costs could renew inflation and prompt central banks to raise interest rates. It also described anxiety about government deficits and the amount of debt being issued. Jefferies economist Mohit Kumar told the paper that inflation, deficit and issuance concerns were weighing on bonds, alongside what he called a 'buyers' strike'. These are explanations and assessments from market participants, not a finding that any single factor caused Thursday's yield increase.

Reuters reported that analysts were also focused on Britain's fiscal vulnerabilities before finance minister John Healey's first budget later in October. It said UK borrowing costs had risen more sharply than those of most other European governments since the Middle East conflict began, amid concern about the country's reliance on natural gas for heating and electricity generation. The reports connect the UK move to both international pressures and domestic exposure, without assigning a measured share of the increase to either.

The Bank of England's September policy summary provides context for those concerns. Its Monetary Policy Committee held Bank Rate at 3.75% by a 6–3 vote, with the three dissenters favouring a rise to 4%. The Bank said the Middle East conflict had pushed energy prices higher and that UK consumer price inflation had reached 3.1% in August. It judged risks to the inflation outlook to be tilted upwards, while saying the policy response would depend on the scale and duration of the energy shock.

The Bank also reported that UK financial conditions had tightened. Its September minutes said higher short-term market rates had fed through to lending rates faced by households and businesses. That is one route through which a prolonged period of market pressure can matter beyond government bonds, although Thursday's 30-year gilt reading alone does not show a new change in any particular household borrowing rate.

What happens before the budget and the next rate decision

Reuters reported that investors expected a Bank of England rate rise in November or December, with another increase priced in for February. Those are market expectations, not announced decisions. Jane Foley, Rabobank's head of G10 foreign exchange strategy, told Reuters that markets had priced in many rises but argued the Bank would be reluctant to increase rates as households faced higher food and energy costs. Her view illustrates a policy tension rather than settling how the Bank will vote.

The Bank's published timetable lists 5 November as its next rate-decision date. Before then, the budget will put the government's borrowing plans under scrutiny while investors continue to assess inflation and debt issuance. The available reporting establishes the 1 October market high and the concerns surrounding it; it does not quantify how much the move will add to actual government borrowing costs or determine the budget's contents.