112024-10-11 17:07:57
Bad economic times also tend to be associated with declining risky asset payouts (declining earnings and dividends for ordinary shares and defaults for bonds), leading to declining asset prices. The result is that the covariance term for risky assets is typically negative...为什么书上说,经济不好的时候cov <0 ?
查看试题回答(1)
爱吃草莓的葡萄2024-10-14 10:39:11
同学你好。经济不好时,跨期替代率上升,资产价格是下降,协方差小于0.
- 评论(0)
- 追问(4)
- 追问
-
那为什么课上老师讲一般,cov < 0, 经济不好的时候 cov>0 ?
- 追答
-
同学你好。条件不一样。同学你提到的是风险资产在经济差的情况下的covariance term,而视频中讲的是无风险债券在经济差的情况下的covariance term。
在经济差的情况下,风险资产价格通常是下降的,无风险资产价格通常是上升的。而经济差的情况下跨期替代率是上升的,因此会出现covariance term不同的情况。
- 追问
-
... likely expecting their future consumption and equity returns to be positively correlated. ......In other words, the covariance between risk-averse investors’ inter-temporal rates of substitution and the expected future prices of equities is highly negative, resulting in a positive and large equity risk premium.
您好,前一段讲,cov(c1, r) > 0,
c1↓, MU1↑, m↑, r↓, P↑, cov(m, P) > 0, 第二段说,cov(m, P) < 0, 哪里错了?
- 追答
-
同学你好。就是上面解释呀。在经济差的情况下,风险资产价格是下降的,无风险资产价格是上升的。同学你前面写的大于0,是无风险资产呀,后面小于0是风险资产呀。在经济差差的情况下都买无风险资产呀,价格被买上去了;都卖无风险资产,把无风险资产价格卖下去了。
首先你得弄清楚是风险资产还是无风险资产,第一步资产类型都判断错了,后面结论就不用看了。


评论
0/1000
追答
0/1000
+上传图片