The arithmetic trap
Suppose a portfolio rises 50% and then falls 50%. The average return is zero — but the investor has lost 25% of their money. R100 becomes R150, then R75. This gap between average returns and compounded returns is what Mark Spitznagel calls the volatility tax.
Every swing in value costs something, and large losses cost the most. A 50% loss requires a 100% gain just to break even.
Try it yourself
Use the calculator below to see how alternating gains and losses erode wealth, even when the average return is exactly zero.
Try it: the volatility tax calculator
R100 invested. Each period the market alternately rises and falls by the same percentage — so the average return is zero.
Why hedging can pay for itself
In Safe Haven: Investing for Financial Storms (2021), Spitznagel argues that a good safe-haven strategy is judged not by its own returns but by its effect on the compound growth of the whole portfolio. A small allocation that pays off strongly in a crash can reduce the volatility tax enough to raise long-run compounding — even though it usually loses money in calm years.
The question is not “does the hedge make money?” but “does the portfolio compound faster with it than without it?”
The cost is real
Tail protection is not free. In rising markets it creates a drag on performance, and poorly designed hedges can cost far more than they ever return. That is why our framework sizes the Tail Protection Layer deliberately — typically 2–5% of the portfolio — and why cost-effectiveness is at the heart of the third framework in our protocol.
This article is provided for general information and education only and does not constitute financial advice. The value of investments may go down as well as up, and past performance is not a guide to future results.
