Meet with PWL Capital: https://pages.pwlcapital.com/en-ca/contact-us?utm_source=content&utm_medium=youtube&utm_campaign=rationalreminder_yt Marco Sammon joins Ben and Dan to unpack his latest paper, ‘Index Rebalancing and Stock Market Composition’, beginning with how Marco’s work (co-written by John Shim) compares to the Nobel Prize-winner Bill Sharpe’s paper, ‘Arithmetic of Active Management.’ We investigate the missing links in Sharpe’s logic before defining “the market” and ascertaining the main objectives of index funds. Then, we dive deeper into the mechanics of Marco’s paper, index and market tracking errors, why delayed rebalancing is more beneficial than instant rebalancing, and the role of technology in the modern tracking error obsession. We also assess the passive-active spectrum of index funds in portfolio management and learn how investors should choose their optimal excess return. To end, Marco shares practical applications for improving performance benchmarked against traditional indexes, and The Aftershow is all about bridging the gap between PWL Capital and you, our listeners. Timestamps: 0:00:00 Intro 0:09:40 Main Topic: Do Index Funds Incur Adverse Selection Costs? 1:01:54 Aftershow Links From Today's Episode: Rational Reminder on iTunes — https://itunes.apple.com/ca/podcast/the-rational-reminder-podcast/id1426530582. Rational Reminder Website — https://rationalreminder.ca/ Rational Reminder on Instagram — https://www.instagram.com/rationalreminder/ Rational Reminder on X — https://x.com/RationalRemind Rational Reminder on TikTok — www.tiktok.com/@rationalreminder Rational Reminder on YouTube — https://www.youtube.com/channel/ Rational Reminder Email — info@rationalreminder.ca Benjamin Felix — https://pwlcapital.com/our-team/ Benjamin on X — https://x.com/benjaminwfelix Benjamin on LinkedIn — https://www.linkedin.com/in/benjaminwfelix/ Dan Bortolotti on LinkedIn — https://www.linkedin.com/in/dan-bortolotti-8a482310/ Episode 322: Prof. Marco Sammon: How are Passive Investors Affecting the Stock Market? — https://rationalreminder.ca/podcast/322 Episode 200: Prof. Eugene Fama — https://rationalreminder.ca/podcast/200 Episode 268: Itzhak Ben-David: ETFs, Investor Behavior, and Hedge Fund Fees — https://rationalreminder.ca/podcast/268 Episode 112: Michael Kitces: Retirement Research and the Business of Financial Advice — https://rationalreminder.ca/podcast/112 Marco Sammon — https://marcosammon.com/ Marco Sammon on LinkedIn — https://www.linkedin.com/in/marco-sammon-b3b81456/ Marco Sammon on X — https://x.com/mcsammon19 Marco Sammon | Harvard Business School — https://www.hbs.edu/faculty/Pages/profile.aspx?facId=1326895 Marco Sammon Email — mcsammon@gmail.com John Shim on LinkedIn — https://www.linkedin.com/in/john-shim-2931271b/ Vanguard — https://global.vanguard.com/ Sheridan Titman on LinkedIn — https://www.linkedin.com/in/sheridan-titman-226b0811/ Alex Chinko — https://alexchinco.com/ Erik Stafford | Harvard Business School — https://www.hbs.edu/faculty/Pages/profile.aspx?facId=6625 Itzhak (Zahi) Ben-David on LinkedIn — https://www.linkedin.com/in/ibendavi/ Bill Ackman on X — https://x.com/billackman ‘Millennium Loses $900 Million on Strategy Roiled by Market Chaos’ — https://www.bloomberg.com/news/articles/2025-03-08/millennium-loses-900-million-on-strategy-roiled-by-market-chaos Bogleheads — https://www.bogleheads.org/ The Money Scope Podcast Episode 8: Canadian Investment Accounts — https://moneyscope.ca/2024/03/01/episode-8-canadian-investment-accounts/ The Wealthy Barber Podcast — https://thewealthybarber.com/podcast/ Financial Advisor Success Podcast — https://www.kitces.com/blog/category/21-financial-advisor-success-podcast/ Financial Advisor Success Podcast Episode 433: When You 10X Your Advisory Firm To Over $20M Of Revenue…And Want To 10X Again, With Cameron Passmore — https://www.kitces.com/blog/cameron-passmore-pwl-capital-10x-revenue-growth-advisory-firm/ Papers From Today’s Episode: ‘The Arithmetic of Active Management’ — https://www.jstor.org/stable/4479386 ‘Index Rebalancing and Stock Market Composition: Do Index Funds Incur Adverse Selection Costs?’ — https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5080459 ‘Luck versus Skill in the Cross-Section of Mutual Fund Returns’ — https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1356021 ‘The Passive-Ownership Share Is Double What You Think It Is’ — https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4188052 ‘Long-Term Returns on the Original S&P 500 Companies’ — https://www.researchgate.net/publication/247884354_Long-Term_Returns_on_the_Original_SP_500_Companies ‘The Price of Immediacy’ — https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1001762 ‘Competition for Attention in the ETF Space’ — https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3765063 ‘Passive in Name Only: Delegated Management and “Index” Investing’ — https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3244991