The FIRE Formula Proof: Why Your Salary Doesn't Appear in Your Time-to-Freedom Calculation
The math is unambiguous. Income cancels out. Here is the step-by-step derivation that proves it.
Deep dive66 articles · page 3 of 7
The math is unambiguous. Income cancels out. Here is the step-by-step derivation that proves it.
Deep diveA dollar put in the S&P 500 in August 2001 grew to about ten dollars. The same dollar in developed markets outside America grew to under five. Most
Index InvestingOne valuation reading sat near the top of its range before the 1929 crash, again before the 2000 dot-com collapse, and again through the 2010s while the
MarketsHigh income is throughput. Wealth is accumulation. The link between the two is not automatic — and the data proves it.
Deep diveLeave a 60/40 portfolio alone for 46 years and it stops being a 60/40 portfolio. It quietly becomes a 95 percent stock portfolio, carrying far more risk
Asset AllocationA new Audi A7 loses $40,702 of its value in five years. A new Honda Accord loses $8,654. Both figures come from the same study of the same used-car
EngineeringThe most-cited number for raising a child in America is $233,610. It comes from a real government report, and it stopped being current a decade ago.
Life EventsYou do not need a lump sum to start. $50 a month becomes about $61k in 30 years; $500 becomes about $610k. The deposit is the one lever you fully control — and raising it moves more than chasing returns ever will.
FoundationsSeneca identified the core asset misallocation problem 2,000 years ago. Modern engineers replicate it daily.
Deep diveThere is a formula that tells you exactly how much of your money to put at risk, it has been public since 1956, and almost nobody should use the number it
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