When you want to invest, you soon come across two main approaches. Think of them as two ways of crossing a lake.
The active pilot
A professional holds the wheel. They try to pick the companies that will do better than the others, buy at the right moment and sell before the storms. That’s active management. It’s expensive, because the pilot has to be paid and because they buy and sell often.
The autopilot
You buy a small piece of every big company in a market in one go, through a fund called an “index fund” or ETF. You don’t try to beat the market: you are the market. That’s passive management. It costs very little.
Who gets there first?
Nobel economics laureate William Sharpe made a very simple argument. All investors put together are the market. So on average, active pilots do exactly as well as the market… before fees. Once their fees are paid, they must, on average, do worse than the autopilot.
Researchers Eugene Fama and Kenneth French checked this across thousands of funds: very few managers beat the market over time, and it’s almost impossible to know in advance which ones will.
That doesn’t make active management useless. Some managers are excellent, and analysing companies is a real craft (Warren Buffett is the proof). But for a family starting out, wanting their child’s money to grow for 10 or 15 years, simplicity and low fees almost always win.
Remember
Passive = buy the whole market, low fees, little effort.
Active = try to beat the market, higher fees, uncertain result.
Over the long run, fees are the only thing you truly control.
Try this tonight with your child
Play “fruit basket”: your child picks 2 fruits at the market that they think are “the best.” You take a bit of everything. Note who has more good fruit at the end of the week. A lovely way to explain why “a bit of everything” is often safer.
Further reading
Sharpe, W. (1991). The Arithmetic of Active Management. Financial Analysts Journal, 47(1).
Fama, E. & French, K. (2010). Luck versus Skill in the Cross-Section of Mutual Fund Returns. Journal of Finance, 65(5).
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Educational content, not investment advice.