日本国债收益率创近20年新高，发生了什么？

Group 1 - Japanese government bond yields have collectively risen, with the 10-year bond yield reaching approximately 1.87% on December 3 and surpassing 1.9% to around 1.92% on December 4, marking the highest level since July 2007 [1] - The 30-year bond yield has significantly increased to 3.44%, breaking through an important threshold, driven by market expectations of a potential interest rate hike by the Bank of Japan in December [1] - Bank of Japan Governor Kazuo Ueda indicated that the central bank would consider the economic and price developments, as well as market dynamics, suggesting a possible interest rate increase in the upcoming monetary policy meeting [1] Group 2 - Following the appointment of Prime Minister Sanae Takaichi, the Bank of Japan has maintained a cautious stance on interest rate hikes, with the benchmark rate held at 0.5% during the October monetary policy meeting [2] - Internal divisions within the Bank of Japan have emerged, with two members voting against maintaining the rate, advocating for an increase to 0.75%, reflecting a growing "hawkish" sentiment [2] - Concerns regarding Japan's fiscal and debt situation have previously led to significant volatility in the bond market, with a notable decline in bid-to-cover ratios during bond auctions earlier in the year [2] Group 3 - The Japanese government has approved a large-scale economic stimulus package amounting to 21.3 trillion yen, which includes 17.7 trillion yen in general account spending, 2.7 trillion yen in tax cuts, and 900 billion yen in special account spending [3]