Instead , longevity risk is used as a diversifier by investors looking for sources of risk uncorrelated with their current portfolios .
相反，寿命风险被投资者当作一种多样化投资，他们寻求与自己目前投资组合无关的风险源。
In fact , due to the zero correlation , commodities are a worthwhile diversifier under a variety of assumptions with respect to their expected return .
Hsbc also notes that there are " compelling economic arguments " for many central banks to increase gold reserves as the financial crisis has elevated bullion 's importance as a portfolio risk diversifier .
