Korea's stock market fell 7.9% today. Semiconductor giants dropped double digits, and Middle East headlines amplified the fear. On evenings like this, it may be more useful to open a book than a brokerage app — say, the collected remarks of Charlie Munger, who died in 2023 at ninety-nine.
To be clear: Munger never saw today's market. What follows is a thought experiment built on his public statements and principles — nobody knows what he would actually have said. But his most famous claims about declines, temperament, and waiting are not poetry; they are checkable. Below, we check them against 33 years of real market data.
First, the drop itself would probably not have impressed him. In a 2009 BBC interview, Munger said: "If you're not willing to react with equanimity to a market price decline of 50% two or three times a century, you're not fit to be a common shareholder, and you deserve the mediocre result you're going to get." His own investment partnership lost roughly 31% in 1973 and again in 1974 — back-to-back. He sat through it, and the compounding that followed made his fortune. By that standard, a single -8% session doesn't even qualify as a once-a-century event.
The equanimity test, measured
Munger's "50% two or three times a century" line sounds like stoic exaggeration. It isn't — if anything, it was optimistic. Take the S&P 500 through SPY, the oldest U.S. ETF, with dividends reinvested, from its 1993 launch to today. In just 33 years — a third of a century — the holder of that single boring index position had to sit through two separate collapses of roughly 50%: −47.5% in the dot-com bust and −55.2% in the global financial crisis, plus a −33.7% crash in 2020 that came and went inside a year. Munger's "two or three times a century" arrived on schedule, early.
And here is what reacting with equanimity — just sitting there — paid:
The line ends around thirty-one times where it started — roughly 10.8% a year, compounded for a third of a century. But look at the shape of the ride: on about 45% of all 8,400+ trading days, the position lost money that day. Nearly half of all days were losing days, on the way to a 31x result. That is the part of compounding nobody frames on the wall — and the reason Munger kept insisting the exam is temperamental, not intellectual.
Now invert it, the way he would: what if you had done the worst possible thing — invested your $100 at the exact top of every bubble, the single most expensive day of each cycle?
| The decline | Peak day | Depth | Back to even | That $100 today |
|---|---|---|---|---|
| Dot-com bust | Mar 24, 2000 | -47.5% | 6.6 years | $775 |
| Global financial crisis | Oct 9, 2007 | -55.2% | 4.8 years | $674 |
| COVID crash | Feb 19, 2020 | -33.7% | 6 months | $242 |
| 2022 bear market | Jan 3, 2022 | -24.5% | 23 months | $166 |
Every one of those worst-timed investors — the person who bought the peak of the dot-com mania, the peak before Lehman, the peak before COVID — ended up multiplying their money anyway, provided they never sold. The damage that proved permanent in those episodes was rarely done by the decline itself; it was done by the exit. Which is, of course, exactly what Munger meant by "the big money is not in the buying and the selling, but in the waiting."
Second, he would have inverted the question. Munger's favorite tool, borrowed from the mathematician Jacobi: "Invert, always invert." Inverted, today's question is not "what do I gain by selling now?" but "what is the most reliable way investors destroy themselves on days like this — and am I avoiding it?" His list would likely include panic selling, leverage that invites margin calls, and late regret over assets one never understood.
Third, he would have audited his temperament. "A lot of people with high IQs are terrible investors because they've got terrible temperaments" was one of his lifelong refrains. The real exam on a crash day is not analytical — it is whether you can execute pre-committed rules while your emotions are screaming.
Fourth, he would most likely have done… nothing. "The big money is not in the buying and the selling, but in the waiting." For Munger, the opposite of action was not laziness but preparation: study in advance, set your criteria in advance, and when the market panics, do only what those criteria dictate.
Alphixir's four strategies sat the same exam today. Their decisions were sealed before the open, cannot be revised as markets swing, and will be graded publicly tomorrow morning — win or lose. If you translated Munger's "temperament" into software, it might look something like that: commit to principles beforehand, and never erase the tape.
1. Munger's "50% declines, two or three times a century" was not hyperbole — the S&P 500 delivered two ~50% collapses in just 33 years, and long-run holders were paid ~31x for sitting through them.
2. Equanimity has a number: about 45% of all trading days lost money on the way to that result. The exam is temperament, not analysis.
3. Even the worst-timed buyers in history — at the exact 2000, 2007, and 2020 peaks — multiplied their money by staying put. The permanent damage came from exits, not declines. Past results guarantee nothing about the future.
Informational and entertainment content only. Not investment advice. A hypothetical frame built on the late Mr. Munger's public remarks; no endorsement implied, no action recommended. Chart and tables are computed from real Tiingo SPY data (adjusted close, dividends reinvested); past performance does not guarantee future results.