For years, many have constructed portfolios using the efficient frontier as a guide, searching for the optimal mix of risk and return. This approach implies there's a single optimal portfolio, but is there one? Markets are dynamic and investment approaches that work for one time horizon could potentially deliver a very different result for another. We'll hear about an approach to research that Fidelity has developed that can help you test the efficient frontier myth. For legal info visit go.fidelity.com/legal