by Rob Arnott, Lillian Wu of Research Affiliates, 9/11/25 Editor’s note: The Research Affiliates Cap-Weighted US ETF (Ticker: RAUS) began trading today based on this research. Key Points By design, the structure of traditional cap-weighted index causes a well-known tendency to buy high and sell low but also an underrecognized propensity for flip-flops. Addition and deletion flip-flops add up […]
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