We have 50 years of annual data on (detrended) ex post prices P∗ t and on (detrended) actual stock prices Pt . We find that the sample variances (svar) are as follows: svar(P∗ t ) = 120 and svar(Pt) = 80. What does this tell us and why?

Essentials of Business Analytics (MindTap Course List)
2nd Edition
ISBN:9781305627734
Author:Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann, David R. Anderson
Publisher:Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann, David R. Anderson
Chapter8: Time Series Analysis And_forecasting
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We have 50 years of annual data on (detrended) ex post prices P∗

t and on

(detrended) actual stock prices Pt . We find that the sample variances (svar) are

as follows:

svar(P∗

t ) = 120 and svar(Pt) = 80.

What does this tell us and why?

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