国开行发行3年期债券，规模80亿元，发行利率1.5019%，预期1.5000%，投标倍数2.23倍，边际倍数2.70倍。

Group 1 - The company issued a 3-year bond with a total scale of 8 billion [1] - The issuance interest rate was set at 1.5019%, slightly above the expected rate of 1.5000% [1] - The bid-to-cover ratio was 2.23 times, indicating strong demand for the bond [1] - The marginal bid-to-cover ratio reached 2.70 times, further reflecting investor interest [1]