云同學(xué)
2018-02-27 17:06老師,38題是哪里的知識點(diǎn),都看不懂答案解釋
所屬:FRM Part II 視頻位置 相關(guān)試題
來源: 視頻位置 相關(guān)試題
1個(gè)回答
Wendy助教
2018-02-27 17:42
該回答已被題主采納
同學(xué)你好,這個(gè)內(nèi)容講義上沒具體涉及,我整體做一下介紹,字?jǐn)?shù)比較多:
1.Introduction
Mean reversion is the tendency of a variable to be pulled back to its long-term mean.
【Definition】
In finance, many variables, such as bonds, interest rates, volatilities, credit spreads, and more, are assumed to exhibit mean reversion.
【Bonds, interest rates, volatilities, credit spreads等都存在mean reversion】
Fixed coupon bonds, which do not default, exhibit strong mean reversion: A bond is typically issued at par, for example at $100. If the bond does not default, at maturity it will revert to exactly that price of $100, which is typically close to its long-term mean.
【債券價(jià)格在不違約的情況在到期會趨向于par value,也就是一級估值中學(xué)的“pull to par”,那么在此處,par value就相當(dāng)于債券價(jià)格的長期均值】
【經(jīng)濟(jì)擴(kuò)張時(shí),由于投資需求增長會抬高利率。高利率會使得過熱的經(jīng)濟(jì)平靜,使得投資需求下降,利率下降,回落至長期均值甚至低于長期均值。在經(jīng)濟(jì)蕭條或者經(jīng)濟(jì)復(fù)蘇開始時(shí),由于擴(kuò)張貨幣政策和財(cái)政政策作用,重新拉動投資需求,從而抬升利率回歸至均值】
-
追答
如圖
-
追答
如圖
-
追問
謝謝老師,不過能講講題目里面的回歸公式嗎,為什么均值回歸系數(shù)是0.75?0.215又代表什么?
-
追答
如圖
