经典题7.1 （2）答案选择B 的解释是说在economic recovery阶段 high-yield spreads are expected to fall the most. 但是 框架图上第50页 credit spread curves over the Economic Cycle 图标中 解释 early expansion情况下 HY spread remains elevated, and HY spread curve is higher than the IG spread curve. 这两个应该怎么理解？谢谢
