郭同學(xué)
2019-11-29 13:21老師好,原版書P638 例題4 ,這道題沒看懂。就是預(yù)測(cè)一年后遠(yuǎn)期匯率和即期匯率一樣,所以即期匯率遵循隨機(jī)原則??這是什么邏輯?
所屬:CFA Level II > Economics 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
Johnny助教
2019-11-29 14:18
該回答已被題主采納
同學(xué)你好,原版書P403頁 5.1 Random Walks章節(jié)的第二段有寫道:
Random walks are quite common in financial time series. For example, many studies have tested and found that currency exchange rates follow a random walk. Consistent with the second point made above, some studies have found that sophisticated exchange rate forecasting models cannot outperform forecasts made using the random walk model, and that the best forecast of the future exchange rate is the current exchange rate.
大意為:許多研究發(fā)現(xiàn)匯率符合隨機(jī)游走,復(fù)雜的匯率預(yù)測(cè)模型并不能比隨機(jī)游走模型表現(xiàn)更好,而且當(dāng)前匯率是對(duì)與未來匯率的最佳預(yù)測(cè)。因此本題選B。
雖然這是經(jīng)濟(jì)學(xué)的匯率題目,但是原文答案在數(shù)量分析的時(shí)間序列分析一章的隨機(jī)游走中。。
