During tax season, family dinners often feature a specific type of conversation. Leaning over, someone—typically a younger cousin—states that they have been purchasing Nvidia. or Tesla. or any stock that has been pushed into their feed for the past two weeks by the algorithms. They are thrilled. They have watched three YouTube videos as part of their research. The older family members nod courteously and silently hope the child understands before the cost of the lesson becomes prohibitive.
The argument against investing in a single stock isn’t really an opinion. It is more akin to math. Hendrik Bessembinder and his colleagues’ 2020 study, which examined 64,000 global stocks over three decades, discovered that only 2.4% of all companies were responsible for all net global wealth creation in the stock market. The remaining 97.6% either lost money, broke even, or disappeared completely. When you first see that figure, your perspective on your own portfolio usually shifts.
It suggests discomfort. You don’t just need to be correct sometimes to choose winners in the long run. You must be correct about the small percentage of businesses that will take an exceptional step, and you must be correct while everyone else is attempting to be correct. Even with terminals, analysts, and decades of experience, the majority of professional fund managers are unable to consistently outperform a simple index. This is consistently confirmed by the Morningstar Active/Passive Barometer in category after category, year after year. It’s difficult not to question why so many small investors continue to think they’ll be the exception as this pattern develops.
| Detail | Information |
|---|---|
| Topic | Investment risk and diversification |
| Single Stock | Direct ownership in one publicly listed company |
| Mutual Fund | Pooled fund holding many securities, professionally managed |
| Key Difference | Concentrated risk vs. instant diversification |
| Average Number of Holdings (Mutual Fund) | 50 to 200+ securities |
| Top-Performing Stocks (1990–2020 Study) | Just 2.4% of firms drove all net global wealth |
| Famous Endorsement | Warren Buffett recommends index funds for average investors |
| Typical Mutual Fund Expense Ratio | 0.03% – 1.5% |
| Average Annual Return — S&P 500 (long term) | Around 10% |
| Risk Profile | Stocks: high volatility · Funds: smoothed |
| Best Suited For Beginners | Mutual funds and index ETFs |
| Common Beginner Mistake | Concentrating savings in 2–3 favourite tickers |
Because mutual funds don’t require you to be correct about any one company, they operate differently. If you purchase a single fund, you may simultaneously own portions of fifty or two hundred companies. The damage is lessened if one collapses. The upside is real but dispersed if one soars. Naturally, there is a trade-off: you will never experience the lottery-ticket morning where a single holding triples overnight. However, you won’t have the day that Lehman Brothers or Pets.com steal your retirement plan. The conclusion of those stories is often forgotten. Until they fail to do so.

However, the more truthful argument in favor of mutual funds is psychological. Single stocks require consideration. Obsession is rewarded by them. In line at the grocery store, you begin comparing prices. At two in the morning, you read earnings transcripts. You persuade yourself that an analyst’s note is more important than it actually is. You can avoid that by investing in a diversified mutual fund, particularly a passive index fund. The ability to stop thinking about it may be the most underappreciated advantage of the entire situation. After a few years of doing it the dull way, there’s a sense that you’ve gained back hours you were unaware you had lost.
Even Warren Buffett, who amassed his wealth by selecting specific businesses, has spent the majority of the last ten years advising ordinary investors not to follow in his footsteps. He stated unequivocally at the 2021 Berkshire Hathaway meeting that the average person just cannot choose stocks. Instead, he suggests investing in an S&P 500 index fund. That advice has a peculiar kind of weight coming from someone who actually owns Berkshire.
All of this does not imply that single stocks are prohibited. As a tiny part of a bigger scheme, there’s nothing wrong with the fact that many people like to hold a few names they believe in. However, the dull solution consistently prevails when it comes to the majority of a person’s savings—the portion intended to compound silently over decades. The world of mutual funds is not glamorous. They don’t make news. Every year, they simply leave investors richer than the cousin who is still chasing the next big ticker.




