The Bank of England has decided to hold its key interest rate steady at 3.75%, while issuing a caution that an escalation of Middle East tensions could force a rate hike if it intensifies inflationary pressures. Six policymakers, including Governor Andrew Bailey, voted in favor of holding the rate, mirroring the same voting split seen at the July meeting.

In prepared remarks, Governor Bailey noted that the global energy shock has so far had a limited impact on UK prices and wages. "But the longer this volatility persists, the greater the impact on inflation, and the higher the likelihood that we will need to raise the bank rate," he stated. Alongside the rate decision, the Bank announced it was abandoning its previous long-dated bond sale program and committed to completing the rundown of its £488 billion bond portfolio by September 2034.

The UK 30-year government bond yield reversed earlier gains, dropping 12 basis points to 5.74%, marking its largest one-day decline since May. Meanwhile, the two-year yield fell 6 basis points to 4.70%. Traders have since pared back bets on further monetary tightening, with markets now pricing in roughly an 85% probability of a rate hike at the November meeting and anticipating fewer than four increases over the next year.

The escalating conflict between the US and Iran is complicating the Bank's policy deliberations. Surging oil and gas prices are pushing up fuel costs and posing risks for UK households, who may face even greater pressure on energy bills when the price cap is adjusted in the new year. In its September meeting minutes, the Bank kept its core policy guidance unchanged, stating it stands "ready to act," while acknowledging that risks are "skewed to the upside," a stance more pronounced than in July.

The minutes warned that price pressures are expected to build gradually in the coming months, and any indirect effects not yet visible in the UK economy could simply be "delayed, not diminished." The Bank now projects inflation will hit double its 2% target early next year, while also upgrading its third-quarter GDP growth forecast to 0.4%. Catherine Mann, Megan Greene, and Huw Pill were the three Monetary Policy Committee members who voted for an increase.

David Rees, global head of economics at Schroders, commented, "Domestically generated inflationary pressures are contained, wage growth is slowing, and an unemployment rate near 5% suggests there's significant slack in the labor market. This doesn't look like an economy that urgently needs higher rates." He added that "the bigger risk lies in fiscal policy."

Adjusting Quantitative Tightening - The Bank of England has made substantial changes to its quantitative tightening program, including scrapping its previous long-dated bond sale arrangement and aiming to complete the reduction of its £488 billion ($650 billion) bond portfolio by 2034. Under the not-yet-finalized plan, the Bank will retain £120 billion of gilts maturing in 2049 or later to match future banknote issuance needs. Another £222 billion of gilts maturing by 2035 will be held to maturity without reinvestment. The remaining £146 billion of gilts maturing between 2035 and 2049 will be sold at a pace of £20 billion per year, potentially directly to the government via the UK Debt Management Office.

In a letter to Chancellor John Healey, Governor Bailey stated that the arrangement "preserves the independence of monetary policy" and aims to achieve "best value for money" by minimizing costs and risks over the life of the program. All scheduled quantitative tightening gilt auctions will be paused until April next year while the Bank finalizes the terms with the Debt Management Office. This pause, as the Bank holds off on selling bonds and no longer competes with government issuance for market demand, could ease the recent upward pressure on gilt yields. However, the arrangement may slightly erode the Chancellor's fiscal headroom under his primary fiscal rules.