do you think the Jensen's value is significant enough away from zero to claim manager performance differed

e Although the estimated alpha may be positive or negative, it may not be sig- nificantly different (statistically) from zero. If it is not, we would conclude that there was insufficient evidence to claim that manager performance differed from the expected level. e In practice, alphas often fail to meet the statistical significance test because of the variability in security returns. This means that if a manager adds value, it may not be detected statistically