02 · Topic

Most investors lose to a fund that does nothing.

13 min readTopic: Investing

Key numbers

88%Of large-cap active US funds trail the S&P 500 over 15 years

67%Of the time lump sum beats dollar-cost averaging

$800/moSaved for 30 years at 8% in the worked fee example

0.10%Target total expense ratio for a sensible portfolio

The market is the average. Most managers fall below it.

The efficient market hypothesis (EMH) in one sentence: prices already reflect public information, so beating the market consistently is difficult. Strong-form EMH (all information, public and private) is almost certainly wrong, because insider trading exists. Semi-strong form (all public information) is mostly right for liquid markets, mostly wrong for small caps and frontier markets where coverage is thin.

The empirical evidence is more damning than the theory. SPIVA, S&P's scorecard tracking active versus passive performance, has shown for two decades that over 15 years, 88% of large-cap active US funds underperform the S&P 500. Survivorship bias makes the real number worse: dead funds are not in the data.

Expense ratios: the tyranny of compounding costs

Bogle's phrase. The argument: a 1% management fee does not cost you 1%. It costs you 1% compounded across every year you hold the fund.

Below: three identical investors saving $800/month for 30 years at an 8% gross return, with different expense ratios eating the result.

0.05% (broad index)1.00% (typical active)2.00% (some advisors)Same contributions, same market return. The only variable is the fee.

Final balances: $1,192,288 at 0.05%, $975,977 at 1%, $803,612 at 2%. The investor paying 1% gave up 18.1% of their final balance. The 2% investor gave up 32.6%.

The fee did not feel large in any single year. It almost never does. That is the point.

Sharpe ratio: risk-adjusted return, with a worked example

Two portfolios returned 8% last year. One had returns that ranged from -2% to +18% across months. The other ranged from +0.4% to +1.2%. The second was a better investment per unit of risk taken. Sharpe ratio is the formula that quantifies that intuition.

Sharpe = (Return − Risk-Free Rate) / Standard Deviation

Worked example, annual figures:

Portfolio A: 10% return, 16% standard deviation
Portfolio B: 7% return, 6% standard deviation
Risk-free rate (10-year Treasury): 4%

Portfolio A's Sharpe is (10 − 4) / 16 = 0.38. Portfolio B's Sharpe is (7 − 4) / 6 = 0.50. Portfolio B produced more return per unit of volatility taken. If you could lever B up to A's risk level, you would beat A's return. Most retail investors cannot lever cleanly, which is why Sharpe is a useful comparison number but not a complete answer.

Dollar-cost averaging vs lump sum

DCA: invest a fixed dollar amount on a schedule. Lump sum: invest the whole amount today. The intuition says DCA is safer. The data says lump sum wins.

Vanguard's 2012 study ran the comparison across the US, UK, and Australia, across 1926 to 2011. Lump sum outperformed DCA roughly 67% of the time, by an average of around 2.3 percentage points over 10 years. The mechanism is simple: markets go up most years, so any strategy that delays getting money in costs you on average.

The case for DCA is psychological, not mathematical. If lump-sum investing into a market that then drops 20% would make you abandon the plan, DCA is the better strategy because it is the one you will actually follow. The discipline you can maintain dominates the strategy you cannot.

Sequence-of-returns risk

Two retirees both average 6% per year over their first 10 years of retirement. Retiree One had three down years up front and then seven good ones. Retiree Two had three good years up front and three down years at the end. Same average return. Different ending wealth, by a lot.

Why: when you are withdrawing, down years sell more shares to fund the same withdrawal, and those shares are gone when the recovery happens. The accumulation phase has the opposite property. A crash at year 3 lets your future contributions buy more shares cheaply.

This is why glide-path strategies (more bonds as you approach retirement) exist. They work as insurance against having a 2008 in year one of retirement, even though they accept lower expected returns.

Tax-loss harvesting and asset location

Two technical-sounding concepts that quietly add 0.3% to 1.0% per year of after-tax return for most investors.

Tax-loss harvesting

Sell a position at a loss in a taxable account, immediately buy a similar-but-not-identical position to keep your exposure, and use the realized loss to offset gains or up to $3,000 of ordinary income per year. Watch the wash-sale rule (you cannot buy back the same security within 30 days). Robo-advisors automate this. The benefit is largest for investors in the 24%+ federal bracket.

Asset location

Different accounts have different tax treatments. Roth IRAs grow tax- free, traditional 401(k)s grow tax-deferred, taxable accounts are taxed yearly on dividends and on gains when sold. The optimization: put tax-inefficient assets (taxable bonds, REITs) in tax-advantaged accounts, and put tax-efficient assets (broad index funds, individual stocks held long-term) in taxable accounts.

Worked location example

$500k portfolio, 60% stocks / 40% bonds, across a Roth and a taxable brokerage of equal size. The naive split puts 60/40 in each. The located split puts the bonds in the Roth and the stocks in taxable. The located version is expected to end up about 12% larger after 30 years, purely from where each asset sat.

The unexciting answer

For most people under 35 with a multi-decade horizon, the right portfolio is some flavor of:

A broad US total-market index fund (e.g. VTI, ITOT, or FZROX)
A total international index fund (e.g. VXUS), 20% to 35% of equities
Optionally, a small bond allocation (VBTLX) that grows toward retirement

Total expense ratio under 0.10%. Automatic monthly contributions. Do not check it more than quarterly. Rebalance once a year on a date you pick in advance, not when the news scares you.

Everything else, including stock picks, options, leveraged ETFs, crypto, and the latest sector ETF, is a story you are telling yourself that the unexciting plan is not enough. The unexciting plan is enough. The cost of the story is the difference between the two portfolios at year 30.

The investor's chief problem, and even his worst enemy, is likely to be himself. Benjamin Graham

Run the numbers

Try your own numbers

Common mistakes

01Comparing a manager's return to their benchmark over one year. Three out of four active managers underperform their benchmark over 15 years. Picking the one that won last year is base-rate neglect.
02Selling during a drawdown. The S&P 500 has been positive in 39 of 50 calendar years. The 11 down years scare investors out at the bottom. Time in the market beats timing the market because timing is a series of two correct decisions, not one.
03Holding individual stocks because they 'feel safer' than an index. An index is roughly 500 individual stocks. Your single pick is more concentrated, not less.
04Ignoring asset location. Bonds in a Roth IRA waste the tax shelter. Put tax-inefficient assets (bonds, REITs) in tax-advantaged accounts; put index funds in taxable.
05Confusing volatility with risk. Volatility is the path; risk is the destination. If you have a 30-year horizon, a year that drops 22% is a discount, not a disaster.

FAQ

Index funds or individual stocks?+

For almost everyone, a broad index fund. It holds roughly 500 companies, so one bad pick cannot sink you, and over 15 years about 88% of active large-cap funds fail to beat the index they are trying to pick from.

Should I invest a lump sum now or spread it out?+

If you have the money, investing it all at once won about 67% of the time in Vanguard's study, because markets rise most years. Spreading it out is worth it only if a sharp drop right after investing would make you abandon the plan.

How much does a 1% fee really cost over a lifetime?+

More than it looks. On $800 a month for 30 years at an 8% gross return, a 1% expense ratio gives up roughly a quarter of your final balance, and a 2% ratio gives up close to half.

What is asset location and why does it matter?+

It is choosing which account holds which asset. Put tax-inefficient holdings like bonds and REITs in tax-advantaged accounts, and keep index funds in taxable accounts. For a 60/40 split, that placement alone can leave you about 12% richer after 30 years.