Rob Arnott, the founder and chairman the Pimco subadviser Research Affiliates LLC, is a man whose expertise is so respected that multiple large firms license his investment ideas.
Arnott's first task was to assess the time-honored tradition of weighting equity indexes by market capitalization. He instead backtested a technique that weighted stocks by revenue, and found that the approach had beaten its market-cap counterpart for decades.
He points out that target-date funds can often have the opposite effect that an investor intends. That means peoples' portfolios could possibly get riskier later in their careers — the exact situation they're trying to avoid.