Japanese government bonds slide on inflation signs, BOJ rate-hike bets

On Monday, Japanese government bonds (JGBs) experienced a decline, pushing yields back to multi-decade highs due to growing inflation concerns and expectations for additional tightening by the Bank of Japan (BOJ). The 10-year JGB yield increased by 2 basis points to 3.095%, marking its highest close since August 1996. Yields have an inverse relationship with bond prices, meaning as yields rise, bond prices fall.

The 2-year yield, most sensitive to BOJ policy rates, rose by 1.5 basis points to 1.950%, achieving a 31-year peak observed last week. The gauge of Japan's service-sector inflation rose in August at the fastest annual pace in over two years, indicating price pressures that may warrant further interest rate increases. Ataru Okumura, a senior rate strategist at SMBC Nikko Securities, noted that since major developed economies face inflation-fueling factors like fiscal expansion and high commodity prices, expectations may grow for the BOJ to eventually tighten monetary policy.

Minutes from the BOJ's July policy meeting revealed board members' focus on inflation, with some members advocating for faster rate hikes. The BOJ raised its key rate to 1.25%, a 31-year high, in this month's meeting. Investors are anticipating auctions of 40-year and 2-year JGBs on Tuesday and Wednesday, respectively. On Monday afternoon, the Ministry of Finance will hold a regular meeting with primary dealers, potentially discussing reducing the issuance amount in liquidity enhancement auctions for 5-to-11-year bonds. The yield on the 30-year JGB increased by 1 basis point to 4.165%.