国开行发行1年期债券，规模50亿元，发行利率1.3599%，预期1.3500%，投标倍数3.41倍，边际倍数4.00倍；国开行发行3年期债券，规模40亿元，发行利率1.6439%，预期1.7200%，投标倍数2.83倍，边际倍数1.44倍；国开行发行5年期债券，规模170亿元，发行利率1.5330%，预期1.5500%，投标倍数2.11倍，边际倍数1.26倍；国开行发行10年期债券，规模200亿元，发行利率1.6558%，预期1.6700%，投标倍数2.32倍，边际倍数1.59倍。

Group 1 - The China Development Bank (CDB) issued a 1-year bond with a scale of 5 billion yuan and an issuance rate of 1.3599%, which was lower than the expected rate of 1.3500%, with a bid-to-cover ratio of 3.41 times and a marginal ratio of 4.00 times [1] - The CDB issued a 3-year bond with a scale of 4 billion yuan and an issuance rate of 1.6439%, which was also lower than the expected rate of 1.7200%, with a bid-to-cover ratio of 2.83 times and a marginal ratio of 1.44 times [1] - The CDB issued a 5-year bond with a scale of 17 billion yuan and an issuance rate of 1.5330%, slightly lower than the expected rate of 1.5500%, with a bid-to-cover ratio of 2.11 times and a marginal ratio of 1.26 times [1] - The CDB issued a 10-year bond with a scale of 20 billion yuan and an issuance rate of 1.6558%, which was lower than the expected rate of 1.6700%, with a bid-to-cover ratio of 2.32 times and a marginal ratio of 1.59 times [1]