利息低,你买的价钱就高。等回头利息回升了,你手上bond的价钱就掉价了,那你不赔了?
“降息本是为了迫使美国人将更多的存款(包括bonds)转为美国国内的大风险投资(如股票,房地产)以刺激美国经济”,这应该是原因之一。主要也是针对美国公司。Companies holds a lot of cash, this may force companies to take sell the bonds and spend out either equipment, or hiring more people, or both, in order to generate higher return.