The upcoming auction of Japan's ten-year government bonds is approaching: the yield is nearing the 3% threshold, with expectations of central bank interest rate hikes becoming the focal point.

Notably, Japan's 10-year government bond auction on Tuesday will test the market's demand for this key maturity bond. Currently, yields are approaching the 3% threshold, and investors are preparing in advance for possible interest rate hikes from the Bank of Japan. On Monday, the yield briefly hit a three-year high of 2.95%, consistently inching closer to the 3% level ahead of the Bank of Japan's rate decision on September 18. Bank of Japan Deputy Governor Masayoshi Amamiya left open the possibility of a rate hike in his speech last week. Ryutaro Kimura, a senior bond strategist at BNP Paribas Asset Management, stated: "If investors adopt a more cautious stance before the September meeting, the auction results for the 10-year Japanese government bonds are likely to be weak. However, some investors may view the 3% yield on 10-year bonds as attractive and increase their purchases, which could prevent the yield from significantly breaking above 3%." Since the Bank of Japan ended the world's last negative interest rate policy in 2024, the Japanese bond market has undergone radical changes. The rise in yields has increased borrowing costs for the government, corporations, and households, while making domestic bonds more attractive to local investors compared to overseas assets. In last week's two-year government bond auction, market demand was weak; meanwhile, the overnight index swap (OIS) indicated a roughly 70% probability of an interest rate hike in September by the Bank of Japan. According to sources, Prime Minister Fumio Kishida's administration supports a recent rate hike, with the next move likely to occur in September or October. Naoya Hasegawa and Yuuki Kimura, strategists at Okasan Securities, pointed out in a report: "The dismal results of last week's two-year government bond auction indicate that market fundamentals remain fragile. If the auction for 10-year government bonds also performs poorly, the upward pressure on yields toward 3% may intensify." U.S. Treasury Secretary Janet Yellen stated in a media interview that she believes the Japanese government and the Bank of Japan "will take measures to support the yen's exchange rate." Even though Japan has spent a record $96.4 billion in the past month to support the yen, the exchange rate remains around 160 yen per dollar, further increasing the pressure for tightening policies. Due to ongoing concerns about Kishida's fiscal measures suppressing super-long-term bonds, investors will also closely monitor the auction for 30-year Japanese government bonds scheduled for Thursday. If the demand in this week's government bond sales is weak, it may trigger a global sell-off, thereby challenging Yellen's efforts to lower long-end U.S. Treasury yields. The results of the 10-year government bond auction will be announced at 12:35 PM Tokyo time on Tuesday. Investors will closely watch the bid-to-cover ratio as a key indicator of demand. The bid-to-cover ratio in last month's auction was 2.56, marking the lowest level since May 2025.