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Expectations vs. Reality with Index Funds

October 26, 2023

When one hears “Russell 2000 Index”, the immediate presumption is a focus on stocks that rank below the top 1,000 in the US market. Surprisingly, the reality is quite different. Due to a combination of active decisions by Russell and methodology adjustments, this index has seen significant changes in its turnover rate and its alignment with its titular mission. While these changes might aid in tracking its indices more efficiently, they might also have implications for expected returns. Dive in as we explore the shifting sands of index funds and the impact of these alterations on investors’ expectations.

Based on the name, one might expect the small cap Russell 2000 Index to primarily hold stocks smaller than the 1,000th largest stock in the US market. However, expectations may diverge from reality because of active index construction decisions made by Russell. In an effort to cater to an increasingly large base of tracking funds, the index provider has incorporated a series of methodology adjustments, such as bands minimizing turnover near the market capitalization breakpoint and multiweek lags between the security rank date and reconstitution date. These changes appear to have reduced the Russell 2000’s turnover from 29.8%, on average, from 1996 to 2005, to 11.8% since 2006. While Russell’s changes likely help facilitate tracking its indices, they potentially come at the expense of expected returns, due to style drift. The Russell 2000 Index, for example, had on average more than 20% of its constituent weight in the largest 1,000 stocks since 2009. An investment approach whose decisions are guided by risk and return propositions, rather than tracking considerations, can better align expectations with reality.

Source: Dimensional, using data from Russell. Frank Russell Company is the source and owner of the trademarks, service marks, and copyrights related to the Russell indices.


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Recent Posts
How Financial Frictions Hinder Innovations

A recent study co-authored by Wharton’s Thomas Winberry reveals that financially constrained firms face a ...

The post How Financial Frictions Hinder Innovations first appeared on Integrated Tax Planning, Legal Planning & Financial Planning.

See more
5 Budgeting Myths That Stop People from Saving

Budgeting is crucial for managing your money well. However, many people avoid it because they ...

The post 5 Budgeting Myths That Stop People from Saving first appeared on Integrated Tax Planning, Legal Planning & Financial Planning.

See more