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13(b). No, it is not clear. Portfolio A earned a higher return than Portfolio B but also had higher
13(c). Using a spreadsheet program, we obtain:
correlation between 1&2: 0.2207
13(d). In theory the correlations should be zero because we want the factors to be independent
of each other.
13(e). Factors 1 and 2 are not highly correlated, but it appears that there is significant correlation
between factors 1 and 3 and factors 2 and 3. Statistically speaking, this leads to problems
of multicollinearity, which would affect regression estimates.
14.
14(a). Using a basic regression package, we get the following results (t-statistics given in
parentheses):
14(b). The adjusted R2’s in both regressions are very high (.967 and .905, respectively.) This
14(c). Factor 1 is the most likely candidate for the market factor because it has a large,
significant, and positive effect on both portfolios. Factors 2 and 3 have different signs in
the two equations.