I posted a video on my YouTube channel covering some of the arguments against market cap weighted index investing - basically that all investors are different and while the market portfolio is theoretically optimal for the average investor, investors who are different from average may consider accommodating those differences through their asset allocation decisions. If an investor is exposed to certain risks outside of their portfolio, like in their job or business, they may want to avoid those risks in their portfolio, while an investor who is not exposed to any risks outside of their portfolio may want to tilt their portfolio toward the risks that most investors want to avoid. As a supplement to that video, we have put together a handful of clips that reinforce the message. I hope that they are useful. Check out Ben's video here: https://youtu.be/4hSFzVoZkiA Episode 169 with John Cochrane: https://youtu.be/gbaCOB6CZ6E Episode 200 with Eugene Fama: https://youtu.be/LLbQux2OZjk Episode 234 with Robert Merton: https://youtu.be/rmYGZvmYknk Episode 220 with Jonathan Berk: https://youtu.be/XOWdKXGXBho