In addition, the ECB could purchase EIB bonds on secondary markets, which would help to keep funding costs low – or even reduce them. More important, purchases of EIB bonds would enable the ECB to undertake quantitative easing without triggering the degree of controversy implied by intervening in 18 separate sovereign-bond markets, where concerns that ECB purchases would affect the relative pricing of sovereigns are very real.
此外，欧洲央行可以在二级市场上购买欧洲投行债券，这将有助于维持甚至削减低融资成本。更重要的是，购买欧洲投行债券能让欧洲央行开启量化宽松而不触发干预18个独立主权债务市场所可能引起的争议——有许多人担心欧洲央行的购买操作会影响主权债券的相对价格。