国债期货涨幅扩大，30年期主力合约涨0.21%

Group 1 - The core viewpoint of the news is that government bond futures have seen an increase in their prices, indicating a potential shift in market sentiment towards safer investments [1][2] Group 2 - The 30-year main contract rose by 0.21%, reflecting a significant increase in long-term bond demand [1] - The 10-year main contract increased by 0.04%, suggesting a moderate rise in investor confidence in mid-term bonds [1] - The 5-year main contract saw a rise of 0.08%, indicating a stable interest in shorter-term bonds [1] - The 2-year main contract experienced a slight increase of 0.02%, showing minimal changes in the short-term bond market [1]