Episode summary
Equal Weight vs. Market Cap Weight Index Funds | Rational Reminder 394
The Rational Reminder Podcast
· · 1 hr 16 min · Hosts: Benjamin Felix, Dan Bortolotti, Ben Wilson
Summary
Equal-weighted index funds are presented as an appealing answer to today’s worries about market concentration and rich valuations, but the episode argues they are really a different risk bet rather than a free diversification upgrade. By forcing every stock in an index to the same weight, equal weighting mechanically reduces dominance by mega-caps, but it also creates large overweights to smaller, cheaper, and generally more volatile companies.
The hosts argue that the strategy’s historical outperformance is mostly explained by those factor tilts, especially size and value, plus a systematic drag from negative momentum because equal-weighted funds repeatedly sell recent winners and buy recent losers. They also highlight practical costs: higher turnover, more sector drift, and more trading friction even when explicit expense ratios look low.
The episode contrasts equal weighting with approaches like Dimensional’s, which seek similar size and value exposure while anchoring more closely to market weights, limiting sector divergence, and reducing momentum-windshield trading. The overall message is that equal weighting may look elegant, but if the goal is factor exposure or portfolio efficiency, there are usually cleaner ways to get there.
Key takeaways
- Equal weighting reduces concentration in mega-cap stocks, but it also creates large unintended tilts toward smaller, cheaper, and more volatile names.
- The hosts say equal-weighted outperformance is mostly explained by size and value exposure, not by equal weighting itself.
- Equal-weighted funds systematically trade against momentum because they must rebalance back to equal weights.
- The episode says equal-weighted S&P 500 funds have had about 10 times the turnover of market-cap-weighted versions in the Canadian data discussed.
- The hosts argue Dimensional-style portfolios can capture similar factor exposure with less sector drift, less turnover, and less negative momentum exposure.
Notable quotes
“The market has determined how much weight each stock should have”
“equal weighting results in large over and underweights at the individual stock and sector levels. Results in high portfolio turnover and it gives you the systematic bet against momentum”
How the episode opens
This is the Rational Reminder podcast, a weekly reality check on sensible investing and financial decision-making from three Canadians. We're hosted by me, Benjamin Felix, chief investment officer, Dan Bordalotti, portfolio manager, and Ben Wilson, head of M&A at PWL Capital.
Awesome. Welcome to episode 394 of the podcast. We got a interesting topic to discuss today. Look forward to getting into it.
I don't know if anybody noticed that unenthusiastic pause after I said the introduction there, but we we we we did get some feedback that our enthusiasm has fallen um since episode 80 back with me and Cameron. So, we're going to work on our enthusiasm. I just want everyone to know we we will read that feedback at the end of the episode, which we appreciate.
I don't mean to I I we we genuinely appreciate the feedback. It was just it was funny to read.
Well, the listener just said we sounded tired, which is accurate. Yeah. So, — We sound tired in that there are long long pauses. — Yeah. And you know, he said compared to episode number 80. Well, we're now at 394, it's tiring.
Yeah. A lot of work, but it's still exciting to to be part of it. — Yeah. I've aged. I've aged a lot. I'm I'm a little more tired than I was in episode 80. It's true. — You've been through a lot, Ben.
Yeah. — So, I I don't know if we said this is episode 394. Uh I do want to say real quick before we get into the topic, uh that an area that PWL has been increasingly active in in working in uh working with clients in is with institutions. So that's things like foundations, endowments, reserve funds for not for-p profofit organizations and the institutional space is is it's fascinating.
From the episode’s captions: roughly the first two minutes, lightly cleaned. Keep watching on YouTube →
Topics
- equal weight vs market cap weighting
- index funds
- volatility and risk
- momentum trading
- rebalancing effects
Companies and tickers mentioned
- Dimensional US Core Equity 1 Fund
- Dimensional US Core Equity 1 Index
Watch the episode
Watch “Equal Weight vs. Market Cap Weight Index Funds | Rational Reminder 394” on YouTube
Summary, takeaways and quote selection by Octagon. Quotes are short excerpts; the full conversation is in the episode.
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The Rational Reminder Podcast, this episode and its artwork belong to Benjamin Felix, Cameron Passmore, and Dan Bortolotti. Octagon is not affiliated with the show; this page is an independent summary.
