US Treasury yields are again under threat as upcoming Japanese government bond (JGB) auctions are set to intensify pressure on global fixed-income markets. This comes shortly after US Treasury Secretary Scott Bessent attempted to rein in long-term borrowing costs by doubling the size of liquidity support buyback operations for 10-year to 30-year Treasury securities. These buybacks, announced on Wednesday, August 19, doubled the operation size to at least $4 billion per buyback, causing an immediate but short-lived relief in the market.
Despite the US Treasury's intervention, concerns persist regarding inflation, expanding government debt, and the significant borrowing needs related to AI development. Investors have indicated a desire for more sustainable support mechanisms and expressed worries about potential market distortions from the current buyback strategy. Bessent stated on Thursday, August 20, that he might further increase the volume of Treasury bonds repurchased, signaling ongoing efforts to manage the yield curve.
In response to the US Treasury's initial move, global long-dated bond yields, including Japanese government bonds, experienced a temporary decline. On Thursday, August 20, Japanese 10-year JGB yields fell 5.5 basis points to 2.835%, and 20-year yields declined 8.5 basis points to 3.690%. However, the upcoming Japanese bond auctions are expected to test this fragile stability. The market remains cautious, particularly given the ongoing concerns about rising government debt, persistent inflation pressures, and higher oil prices linked to Middle East conflicts. These factors contribute to uncertainty about the future path of monetary policy from major central banks and could lead to renewed upward pressure on yields globally.
