The ECB has already attempted to ease credit conditions by purchasing high-quality asset-backed securities. It has bought securities backed by cash flows from private-sector mortgages, so-called covered bonds, and it has floated the idea of buying corporate bonds and multilateral securities issued by the European Investment Bank.
欧洲央行已经开始尝试通过购买高品质资产支持证券放松信用条件。它购买以私人部门按揭贷款现金流为支持的证券——所谓的有担保债券，还提出了购买公司债券和欧洲投资银行发行的多边证券的想法。