Answer: a. 11.5%
Step-by-step explanation:
Fad followers are those investors who follow a trend when it emerges and as such their betas will be less than that of informed traders because the informed traders would have acted first.
Using the Capital Asset Pricing Model to calculate expected return.
Er = Rf + b( Rm - Rf)
Er = Expected return
Rf = Risk Free Rate
b = Beta
Rm = Market Return.
The Expected Return for the Informed Investors is,
= 4% + 1.4 ( 10% - 4%)
= 4% + 1.4 ( 6%)
= 12.4%
With the Fad followed expected to have a lower beta and therefore a lower expected return than the Informed Investors, the only suitable option is the 11.5%.