But, because these investments do not reflect the real preferences of agents for future over current consumption, the savings necessary to complete them are not available. They can be kept going for a time by monetary injections from the central bank.
但由于这类投资未能反映机构在当期消费下对未来的真实偏好，因此完成这些投资所必需的储蓄也并不存在。虽然在中央银行的货币注入下还能继续维持一段时间，但市场参与者最终会意识到没有足够的储蓄去完成所有投资，于是泡沫开始破灭。