According to online reports, according to The Kobeissi Letter analysis, within 45 days, the yield on Japan's 30-year government bonds rose sharply by 100 basis points to a record high of 3.20%. That means safe 40-year Japanese government bonds worth more than $500 billion fell by more than 20% in six weeks. It is worth noting that the yield on Japan's 40-year government bonds was about 1.3% two years ago, but the current yield is 3.5%. The Kobeissi Letter said the surge began with a major policy shift by the Bank of Japan (BOJ). The Bank of Japan stopped buying bonds after years of buying bonds. This caused more bond supply to enter the market, pushing up yields. Last week, Japan's prime minister warned that its fiscal situation was worse than Greece's. As Japan's economy slows and uncertainty rises, yields are accelerating. This will cause great damage to the Japanese economy.