Here's Why Most People Can't Beat the Stock Market | The Informed Investor 45 Video
The Informed InvestorShow Notes
Episode 45: Does "market efficiency" sound like investing gobbledygook? For many people, the phrase is hard to comprehend. When they see the stock market soar or plunge, they might think prices are out of whack. When they hear about a lucky few making a killing or sad sacks losing their shirt, efficiency probably isn't what comes to mind. But for most investors, it's helpful to dispense with these knee-jerk conclusions. Every day, buyers and sellers come to the market and together determine an asset's fair value. This means the prices at which those trades are executed already incorporate all the information available to those buyers and sellers. The market is an efficient information-processing machine. No, prices aren't necessarily right, whatever that means. But they are fair, according to the efficient market hypothesis, the idea coined in the 1960s by Nobel laureate Eugene Fama, a professor at the University of Chicago Booth School of Business. The implication is that anyone who buys or sells thinking they can make a killing based on mispricing is likely to be disappointed. That doesn't mean it's impossible. Just unlikely. Research going back decades provides ample evidence that money managers can't seem to beat the market consistently. Are there sensible alternatives? One option is to rely on what capital markets can deliver while modifying your portfolio based on your risk tolerance and investment goals. In Episode 45 of The Informed Investor, Dimensional's Mark Gochnour, Head of Global Client Services, Wes Crill, Senior Client Solutions Director, and Jake DeKinder, Head of Client Communications, dig into the misunderstood concept of market efficiency and show how this elegant idea can help most people have a better investment experience. LINKS FROM TODAY'S EPISODE: Subscribe to the Stay Calm Investing Newsletter https://www.staycalminvesting.com/newsletter The Informed Investor: Feedback Survey https://www.dimensional.com/us-en/informed-investor-survey The Informed Investor on YouTube https://www.youtube.com/playlist?list=PLCyJr6FFig-h1mA7rVP7Mbk0irFw2wA90 Dimensional Fund Advisors Shorts on YouTube https://www.youtube.com/@dimensionalfundadvisors/shorts Mark Gochnour on LinkedIn https://www.linkedin.com/in/mark-gochnour-9a23598a/ Wes Crill on LinkedIn https://www.linkedin.com/in/wes-crill-77a49417/ Jake DeKinder on LinkedIn https://www.linkedin.com/in/jake-d-4105b98/ Learn more at https://www.dimensional.com/
More from The Informed Investor
Episode 61: The allure of index funds, such as broad diversification, low costs, and market-matching returns, may seem undeniable. But recent "reconstitution" in the indexes tracked by such funds tells a different story—one every investor should understand.
Episode 60: Every two years, millions of investors probably ask themselves (and their advisors) whether looming elections demand changes to their investment portfolios. It's an understandable sentiment—and one that demands discussion. But the most important conclusion from these conversations should never change: Since the data doesn't show any strong connection between election results and stock market performance, it's best to vote with your ballot, not your portfolio. No matter how you slice, dice, or take a hatchet to the data, factor in your own political proclivities, or scream about what you think is totally wrong or right about the candidates, market prices have already incorporated all that information (and thousands of other developments, including numerous economic indicators) as investors consider what to do next. This is a well-researched theory of how capital markets work. The implication is that the stock market doesn't really care what you think about this year's midterm elections or the next presidential horse race. Need supporting evidence? Fourteen of 17 presidential terms since 1929, across administrations with both Democratic and Republican chief executives, ended with positive returns for the S&P 500 Index. (S&P data © 2026 S&P Dow Jones Indices LLC, a division of S&P Global.) Investors shouldn't ignore elections, of course. But their portfolios may benefit from standing pat as politics rile and emotions rock and roll. In Episode 60 of The Informed Investor podcast, Dimensional's Mark Gochnour, Head of Global Client Services, Wes Crill, Senior Client Solutions Director, and Jake DeKinder, Head of Client Communications, interrogate common myths about the impact of elections on markets and offer sensible answers as investors head to the polls. LINKS FROM TODAY'S EPISODE: "Stay Calm: Learn to Embrace Uncertainty in Investing and Life" Order the new book by Dimensional Founder David Booth https://www.amazon.com/gp/product/B0GPDHGH8K/?maas=maas_adg_2F97289929AB0BA26D806A1F81D55D66_afap_abs&ref_=aa_maas&tag=maas&smid=ATVPDKIKX0DER Subscribe to the Stay Calm Investing Newsletter https://www.staycalminvesting.com/newsletter?utm_source=youtube&utm_medium=organic&utm_campaign=informed_investor The Informed Investor: Feedback Survey https://www.dimensional.com/us-en/informed-investor-survey?utm_source=youtube&utm_medium=organic&utm_campaign=informed_investor "The Informed Investor" on YouTube The Informed Investor - YouTube Dimensional Fund Advisors Shorts on YouTube https://www.youtube.com/@dimensionalfundadvisors/shorts Mark Gochnour on LinkedIn https://www.linkedin.com/in/mark-gochnour-9a23598a/ Wes Crill on LinkedIn https://www.linkedin.com/in/wes-crill-77a49417/ Jake DeKinder on LinkedIn https://www.linkedin.com/in/jake-d-4105b98/ Learn more at https://www.dimensional.com/?utm_source=youtube&utm_medium=organic&utm_campaign=informed_investor For US audiences: Select videos are available as part of an opportunity for CFP® and Investments & Wealth Institute® professionals to earn continuing education (CE) credits https://www.dimensional.com/financial-professionals/ce-credit-experience-d360?utm_source=youtube&utm_medium=organic&utm_campaign=informed_investor
Episode 59: What happens when you rethink how financial advice is delivered—and how an industry comes together?
Episode 58: Any financial professional who joined the industry a week after Black Monday—when the stock market suffered its biggest single-day loss—knows something about investment discipline.
Episode 57: How much of your portfolio should really be invested in alternatives? For ultra-high-net-worth investors and families, alternative investments have long been viewed as a path to diversification, exclusive access, and potentially higher returns. But are they always worth the complexity, illiquidity, fees, and taxes that come with them? We take a critical look at the world of alternatives—from hedge funds, private equity, and venture capital to private real estate and other non-public investments. We explore where returns actually come from, looking at the impact of enterprise risk, financial engineering, and manager skill, and examine whether those sources of return truly justify the additional costs and complexity. We also discuss the role of liquidity, diversification, taxation, manager selection, and investment purpose when evaluating alternatives. Are private investments genuinely less volatile, or do appraisal-based valuations simply make them look that way? And as access expands beyond institutions and ultra-wealthy families into vehicles such as 401(k) plans, are investors really gaining access to the same opportunities? Finally, we look at one of the original homes of alternative investing: endowments. If institutions with long time horizons, sophisticated investment teams, and access to top-tier managers have not consistently outperformed comparable public-market portfolios, what should individual investors conclude? In Episode 57 of The Informed Investor, Dimensional's Mark Gochnour, Head of Global Client Services, sits down with Jeff Coyle, founder and CEO of Libretto. The takeaway: Alternatives aren't inherently good or bad—they need to be deconstructed, evaluated, and compared against the public markets with a clear understanding of where the return comes from and what you're paying to get it. LINKS FROM TODAY'S EPISODE: Subscribe to the Stay Calm Investing Newsletter https://www.staycalminvesting.com/newsletter?utm_source=youtube&utm_medium=organic&utm_campaign=informed_investor The Informed Investor: Feedback Survey https://www.dimensional.com/us-en/informed-investor-survey?utm_source=youtube&utm_medium=organic&utm_campaign=informed_investor "The Informed Investor" on YouTube The Informed Investor - YouTube Dimensional Fund Advisors Shorts on YouTube https://www.youtube.com/@dimensionalfundadvisors/shorts Mark Gochnour on LinkedIn https://www.linkedin.com/in/mark-gochnour-9a23598a/ Jeff Coyle on LinkedIn https://www.linkedin.com/in/jeffcoylelibretto Learn more at https://www.dimensional.com/?utm_source=youtube&utm_medium=organic&utm_campaign=informed_investor For US audiences: Select videos are available as part of an opportunity for CFP® and Investments & Wealth Institute® professionals to earn continuing education (CE) credits https://www.dimensional.com/financial-professionals/ce-credit-experience-d360?utm_source=youtube&utm_medium=organic&utm_campaign=informed_investor