In this brief interview, David M. Blanchett, CFA, head of retirement research at Morningstar Investment Management, explains the concept of gamma as a measure of the impact of financial planning decisions and details the additional portfolio returns a gamma-based strategy provides. He also discusses how spending in retirement fluctuates and its implications for financial planning, how to determine a safe withdrawal rate in retirement, as well as how investors can best mitigate longevity risk.  

The Take 15 Series is a series of short interviews with leading practitioners on timely topics focused on the investment profession.