问题
单项选择题
An analyst does research about relationship between credit spreads and economic well being. In general, credit spreads on corporate bonds tend to:（）
A. tighten during both economic expansions and economic contractions.
B. widen during economic expansions and tighten during economic contractions.
C. tighten during economic expansions and widen during economic contractions.
答案
参考答案：C
解析：
在经济好的情况下，收益率的溢价会降低；而在经济不好的情况下，收益率的溢价会提高，此时人们需要一个更高的收益率作为补偿。