国开行发行2年期债券，规模50亿元，发行利率1.4689%，预期1.4600%，投标倍数3.46倍；国开行发行3年期债券，规模50亿元，发行利率1.6313%，预期1.6000%，投标倍数2.54倍，边际倍数1.01倍；国开行发行5年期债券，规模110亿元，发行利率1.5230%，预期1.5200%，投标倍数2.82倍；国开行发行10年期债券，规模210亿元，发行利率1.6569%，预期1.6500%，投标倍数2.26倍，边际倍数2.64倍。

Group 1 - The China Development Bank (CDB) issued a 2-year bond with a scale of 5 billion yuan and an issuance rate of 1.4689%, exceeding the expected rate of 1.4600%, with a bid-to-cover ratio of 3.46 times [1] - The CDB issued a 3-year bond with a scale of 5 billion yuan and an issuance rate of 1.6313%, higher than the expected rate of 1.6000%, with a bid-to-cover ratio of 2.54 times and a marginal ratio of 1.01 times [1] - The CDB issued a 5-year bond with a scale of 11 billion yuan and an issuance rate of 1.5230%, slightly above the expected rate of 1.5200%, with a bid-to-cover ratio of 2.82 times [1] - The CDB issued a 10-year bond with a scale of 21 billion yuan and an issuance rate of 1.6569%, also above the expected rate of 1.6500%, with a bid-to-cover ratio of 2.26 times and a marginal ratio of 2.64 times [1]