Most investing advice focuses on finding the next big winner. Far less is written about the quieter discipline that often determines whether you finish wealthy: avoiding losses that permanently interrupt compounding.
The arithmetic explains why.
If you lose 10%, you need an 11% gain to break even. Lose 20%, and you need 25%. Lose 50%, and you need 100%. Lose 80%, and you need 400% just to return to where you started. The deeper the hole, the disproportionately harder it becomes to climb out.
This asymmetry is also hidden within “average” returns. A portfolio that gains 50% in one year and loses 50% the next has an arithmetic average return of 0%. Yet an investor who started with $100 would finish with only $75—a loss of 25%.
A large drawdown costs you more than capital. It also costs you the time and compounding required to recover.
When a decline becomes permanent
The arithmetic of losses is unforgiving, but not every fall in share price represents a permanent loss. Markets fluctuate, and even strong businesses can experience sharp declines without suffering any lasting damage.
What matters is whether the conditions for recovery remain intact. A falling share price becomes a permanent loss when the business deteriorates, you are forced to sell before it recovers, or you paid a valuation that the company’s future growth cannot justify.
These are the three ways it happens:
1. You are forced, or frightened, into selling
A paper loss becomes a realised loss when you sell. If the company’s fundamentals remain intact and it continues to generate healthy earnings, selling during a market panic may be a costly mistake. The share price could recover, but you will no longer be around to benefit.
Leverage makes this danger worse. A margin call can force you to sell at precisely the wrong time, taking away your ability to wait—one of the greatest advantages an individual investor has.
Unlike a fund manager, you generally do not face investor withdrawals or pressure to justify your performance every quarter. Without leverage, you can give a sound investment thesis time to play out.
2. The business deteriorates
A company’s earnings power can become structurally impaired by technological disruption, excessive debt, poor capital allocation, or fraud. This is different from a temporary slowdown caused by an economic cycle.
Malaysian investors may remember Serba Dinamik. The company was once a market darling. But in May 2021, its auditor raised concerns over irregularities involving billions of ringgit in sales and receivables. Trading in its shares was suspended in January 2023, and the company was delisted from Bursa Malaysia in June 2024.
Its shareholders were not simply waiting for the share price to recover. The business itself had been fundamentally damaged; there was little left to recover.
3. You pay too much
You can correctly identify an excellent business and still earn poor returns if you overpay for it.
Suppose you buy a company at 40 times earnings and its earnings subsequently grow by 15% a year—genuinely excellent performance. If the market later re-rates the company to 20 times earnings, its valuation multiple has halved. Earnings must therefore double just for the share price to remain unchanged.
At an annual growth rate of 15%, that would take roughly five years, based on the Rule of 72 (72 ÷ 15 ≈ 4.8). After five years of the business performing exactly as you had hoped, your investment would still be worth only what you originally paid. You were right about the company but wrong about the price.
So, when one of your holdings falls, do not begin by asking whether you should sell. Ask this first: Has the company’s long-term earnings power deteriorated, or has only its share price fallen?
How to avoid permanent losses
Avoiding permanent loss does not require predicting every downturn. It requires building a portfolio that can survive your mistakes and remain intact during difficult periods.
- Size positions conservatively. No single mistake should be capable of ending the game. If one holding going to zero would cause catastrophic damage to your portfolio, the position is too large. Investing is an infinite game. The first objective is to stay in it.
- Demand a margin of safety. A margin of safety is the gap between what you estimate a business is worth and the price you pay. That buffer protects you from errors in your forecasts and assumptions. The more uncertain the business, the wider the margin of safety should be. Conviction is not a substitute for valuation.
- Examine the balance sheet. Debt can turn a difficult year into a terminal one. Ask whether the company can comfortably service its obligations if revenue falls, margins contract, or credit becomes more expensive. A resilient business should be able to endure adversity without raising capital at a distressed price or putting its survival at risk.
- Avoid leverage and maintain sufficient cash. Leverage can force you to sell when prices are lowest. Adequate cash does the opposite: it allows you to meet your needs without liquidating investments and gives you the ability to buy when attractive opportunities appear. Cash is not merely an idle asset. Used appropriately, it preserves your ability to act.
- Write down your investment thesis. Before buying, record why you believe the company will grow, what could prove you wrong, and which developments would justify selling. This becomes especially valuable during a sharp decline. When emotions are running high, a dated and unemotional thesis can help you determine whether the investment is fundamentally broken or merely unpopular.
The losses that do not appear in red
Protecting capital should not become an excuse to avoid all risk. Excessive caution creates losses of its own.
Inflation gradually erodes cash that earns less than the rising cost of living. Money left idle for years while you wait for perfect certainty sacrifices potential returns. Fees, taxes, and excessive trading remove small amounts of capital that can compound into a large shortfall over time.
Time matters too. An investment that takes five years merely to return to its purchase price may show no nominal loss, but the investor has still lost five years of potential compounding.
These risks are less dramatic than a market crash, but they remind us that “not losing” does not mean keeping every dollar in cash. Capital that is never exposed to risk may never suffer a visible decline, but it cannot compound meaningfully either.
The fifth perspective
Not losing does not mean never being wrong. Every investor will make mistakes and suffer losses. The objective is to ensure that those mistakes remain survivable.
Taken too far, loss avoidance can become its own failure: holding cash indefinitely, refusing to sell a broken business because doing so would make the loss real, or diversifying so widely that good ideas make no meaningful difference.
The ideal outcome is not the complete absence of losses. It is a portfolio with many small, manageable mistakes, a handful of meaningful winners, and no single event capable of knocking you out of the game.
Survive first. Compounding will do the rest.
