US Treasury yields experienced a bull steepening after June's Consumer Price Index (CPI) data revealed both headline and core inflation figures came in below market expectations. This unexpected slowdown was driven in part by declines in energy prices and certain core services sectors, according to FX Street.

Economists Samuel Tse and Eugene Leow from DBS Group Research highlighted that the softer inflation readings contributed directly to the shift in the US Treasuries curve, reflecting a market reassessment of future interest rate moves and inflation risks.

For Japanese investors, the movement in US Treasuries remains a key factor influencing global fixed income markets and currency flows, particularly given Japan's ongoing monetary policy stance and its impact on yen-dollar dynamics.