TL;DR
The most important thing in investing is not avoiding risk but calculating how much of it you can still absorb — and what survives the maths stops being a big risk.
People tell the author he has lost his mind: he cashed out home equity through a refinance and put it into index funds. Isn't that just suicide?
The author's answer is arithmetic. When he refinances, the mortgage can only be raised to 70 or 75 percent of the property's current value. He still holds 25 to 30 percent of the equity himself.
Who you compare yourself to decides how bold you look
Plenty of American households buy with 5 to 20 percent down. Measured against that yardstick, the author's leverage is the lower number.
Borrowing against property, borrowing against a stock portfolio — wealthy and middle-class people have done both for years. The difference is whether anyone did the maths first.
Financial advisers broadly agree that risk management is the single most important thing in investing. But risk is not something you dodge. Buying a home, starting a business, taking a job — none of it lets you opt out.
Poor households cannot absorb the swings and get shaken out early. The middle class and the wealthy ride them far more comfortably, and the buffer is the whole difference.
Hence what the author calls his third theorem: a risk you can still carry after you have run the numbers is not much of a risk.
What that formula actually protects is not the return but the nerve — which is why he can sit still while the market lurches.
Strip away the jargon: a gambler and an investor differ not in courage but in whether they worked out the worst case before placing the bet.
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