Will merely shopping for the S&P500 be sufficient?

I’ve been occupied with the state of passive investing because the message “simply purchase the S&P 500” turned the predominant narrative in recent times. This thought was first posed to me by our former GIC chief and Presidential candidate Ng Kok Track a couple of years in the past, and I haven’t been in a position to shrug it off since. In my current journey to Omaha for the 2025 Berkshire Hathaway AGM, I had the fortune to fulfill with many clever buyers and thought leaders as we talked about shares and the rising theme of passive buyers who merely purchase index funds each month with out considering. Is that this “purchase and neglect” technique sufficient? How do these form the markets, and are they inflicting an even bigger valuation hole for corporations who aren’t within the massive market indices (but)? Might the brand new 10X technique be to seek out worthwhile small-cap corporations which can be quickly rising and make investments…