The yield on the UK 30-year government bond rose by 9 basis points to 5.88%, reaching its highest level since March 1998, indicating a simultaneous drop in the price of UK government bonds of the same duration.

This increase is concentrated in the ultra-long end of the UK bond market, rather than a single short-end rate change. The 30-year yield approaching 6% shows that investors demand higher compensation to hold long-term UK government bonds, which are more sensitive to fiscal supply, inflation, and interest rate expectations.

9 basis points is equivalent to 0.09 percentage points. For long-duration bonds, such daily rate changes can significantly impact market value: the longer the remaining duration of the bond, the greater the price drop typically caused by rising yields. The yield is not the borrowing rate directly adjusted by the UK government that day, but rather the result of trading by investors in the secondary market.

Reports from the open market link the rise in UK ultra-long bond yields with a simultaneous increase in Japanese long-term bond yields, reflecting selling pressure in the global long bond market; on the same trading day, rising energy prices and geopolitical military risks also disturbed inflation expectations and the pricing of safe-haven assets.

This yield reaching a high not seen since 1998 does not imply that all maturities of UK government bonds are at the same level, nor does it mean that the Bank of England has taken action to raise interest rates that day. Long bond yields are priced collectively by the market and are influenced by future inflation, fiscal deficits, issuance volumes, pension fund flows, overseas buying, quantitative tightening, and term premiums.

In terms of market mechanisms, sellers include pension funds, insurance capital, macro funds that need to reduce duration risk, and investors who are cautious about the financing pressures on UK finances; buyers will only take on bonds when higher yields sufficiently compensate for inflation and duration risks. Beneficiaries include short-duration cash assets, money market funds, and certain bank assets that may see improved spreads; pressured parties include the UK government's new financing costs, mortgages and corporate long-term financing, long-duration growth stocks, and liability-driven investment portfolios holding large amounts of ultra-long UK bonds. If yields remain high, they will transmit through government bond refinancing and risk-free rates to housing, corporate investment, and fiscal budgets.

Source: Public Information