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Reinventing Cap-Weighted Indexing
by Rob Arnott, Lillian Wu of Research Affiliates, 9/11/25

There has not been a fundamental innovation in broad-market cap-weighted indexing in decades. Until now. With the Research Affiliates Cap-Weighted Index (RACWI), we introduce a fresh approach designed to fix a costly but little-known “bug” in cap-weighted indexing.

Big Market Delusion: Electric Vehicles
by Rob Arnott , Lillian Wu , Bradford Cornell of Research Affiliates, 3/9/21

The “big market delusion” is when all firms in an evolving industry rise together, although as competitors ultimately some will win and some will lose.

Where's the Beef? "Lies, Damned Lies, and Statistics"
by Rob Arnott, Lillian Wu of Research Affiliates, 5/5/16
The inflation rate has a direct bearing on our prosperity. Official government measurements show very low inflation, despite underlying inflation being higher than overall inflation. This raises the question—what is inflation measuring?

What Are We Doing to Our Young Investors?
by Rob Arnott, Lillian Wu of Research Affiliates, 10/15/14
In the latest piece from Research Affiliates, Rob Arnott, chairman and CEO, and Lillian Wu, researcher, look at the growing use of target date funds by young workers, and how their defined contribution (DC) portfolios are therefore increasingly concentrated in stocks. However, young workers are more likely to cash out their DC assets to meet living expenses during a recession or other hardship, and equity volatility could leave them in a bind. Arnott and Wu offer a potential solution: less risky starter portfolios.
4 results found.