日本10年期和30年期国债收益率差一度扩大至纪录最阔水平，此前日本央行的一项操作暗示，投资者卖出较长期债券的需求强劲。

Core Viewpoint - The yield spread between Japan's 10-year and 30-year government bonds has widened to a record level, indicating strong demand from investors for selling longer-term bonds following a recent operation by the Bank of Japan [1] Group 1 - The yield spread reached a record high, reflecting significant market movements [1] - The Bank of Japan's recent operation has influenced investor behavior, leading to increased selling of long-term bonds [1]