High-Yield Attraction: Japan's 40-Year Government Bond Auction Covered 3.1 Times, Strongest Demand Since 2020

According to Zhihui Finance APP, Japan's 40-year government bond auction recorded the strongest demand in six years, as high yields attracted investors back to Japan's longest-maturity debt product, offering a potential respite for fragile global markets.

This auction's bid-to-cover ratio reached 3.1 times, the highest since 2020, surpassing the previous auction's 2.82 times and well above the 12-month average of 2.67 times. Demand was partly boosted by the reduction in 40-year bond issuance in May, while market expectations of more aggressive rate hikes by the Bank of Japan also helped ease inflation concerns.

Rinto Maruyama, Senior Rates and FX Strategist at SMBC Nikko Securities, stated: "Market expectations are that the Federal Reserve and Bank of Japan will continue to raise rates, mainly putting upward pressure on shorter-term yields. Meanwhile, as markets believe that tighter monetary policy will eventually control inflation, term premiums are narrowing."

There is growing speculation that the Bank of Japan may raise rates again as early as next month. Previously, the Bank of Japan had decided to raise the benchmark rate to a 31-year high of 1.25%. Former Bank of Japan monetary policy official Kazuo Momma also agreed with this outlook in an interview.

Meanwhile, Japanese and US policymakers intervened verbally last week to curb the yen's decline, helping to support market sentiment.

This strong auction could bring temporary relief to global bond markets. Recently, global bond markets have been rattled by increased AI spending, inflation triggered by the Middle East war, and ballooning government debt worldwide. The benchmark 30-year US Treasury yield hit a 22-year high of 5.58% on Monday.

The 40-year Japanese bond is traditionally favored by life insurers to match long-term liabilities, making this auction a key indicator of whether higher yields are drawing these buyers back.

Masayuki Koguchi, Chief Fund Manager at Mitsubishi UFJ Asset Management, said that despite the strong auction result, it will take time to determine whether underlying demand is truly solid.

Fiscal concerns continue to weigh on Japanese government bonds. It was previously reported that Japan is considering raising its medium-term defense spending target to 3.5% of GDP, bringing Japan in line with NATO and other major US allies. The potential increase has heightened scrutiny of Prime Minister Sanae Takaichi's broader fiscal agenda and how her government will finance additional expenditures.

Maruyama of SMBC Nikko stated that, meanwhile, with the Bank of Japan expected to accelerate rate hikes, shorter-term bonds may continue to face pressure.

Market focus has now shifted to Wednesday's two-year government bond auction, where investors will closely watch for signals regarding the Bank of Japan's policy path. As one of the tenors most sensitive to rate expectations, the two-year yield is currently hovering near 2%, with traders pricing in the risk of accelerated monetary tightening.