When we're talking about a flat yield curve, it's a bunch of notes that are roughly the same pitch.
当我们谈论平坦的收益率曲线时，那就是一堆音高几乎相同的音符。
金融时报
Now a flat yield curve typically tells you that the market is signalling that an economic slowdown is on the way.
平坦的收益率曲线通常告诉你，市场正在发出经济放缓的信号。
英语百科
Current yield
（重定向自Flat yield）
The current yield, interest yield, income yield, flat yield, market yield, mark to market yield or running yield is a financial term used in reference to bonds and other fixed-interest securities such as gilts. It is the ratio of the annual interest payment and the bond's current clean price: