Worried that the programme will be allowed to lapse at the end of the year , issuers have rushed to issue build america bonds ( babs ) , taxable but interest-subsidised debt introduced as part of the stimulus package .

由于担心这种途径可能将于年底失效，发行机构竞相发行“建设美国债券”，这种债券可以征税，但是利息享受补贴，是作为刺激政策的一部分而引入的。