We develop conditional alpha performance measures that are consistent with conditional mean-variance analysis and the magnitude and sign of the implied true conditional time-varying alphas. The sequence of conditional alphas and betas is estimable from surprisingly simple unconditional...

We conduct an experiment in which assets of lower volatility risk are sequentially added to the investment opportunity set (IOS) of a fixed investment horizon. Econometric spanning tests show that the limiting IOS is the linear boundaries defined by the limiting IOS asymptotes, implying more...