Sep 15, 2026
A 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 Investing Sep 10, 2026
One 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
Markets Sep 9, 2026
High income is throughput. Wealth is accumulation. The link between the two is not automatic — and the data proves it.
Deep dive Sep 8, 2026
Leave 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 Allocation Sep 4, 2026
A 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
Engineering Sep 3, 2026
The 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 Events Sep 3, 2026
You 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.
Foundations Sep 2, 2026
Seneca identified the core asset misallocation problem 2,000 years ago. Modern engineers replicate it daily.
Deep dive Sep 1, 2026
There 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
Advanced Sep 1, 2026
A high-yield savings account and a diversified index fund both compound. Feed each the same $500 a month for 35 years and one ends at $251k and the other at $901k. The gap is the whole argument.
Foundations Aug 29, 2026
In 2022 a 10-year US Treasury lost about 15 percent. That is the worst calendar year for the safest asset in the portfolio since at least 1928, and it was
Inflation & Fixed Income Aug 27, 2026
Prepaying a dollar of mortgage principal earns a guaranteed return equal to your mortgage rate. Investing that same dollar earns more on average and
Debt & Savings Aug 27, 2026
A 1 percent fee sounds like a rounding error. Run it through one line of mental math and it turns a 7 percent return into a 6 percent return, which pushes
Foundations Aug 26, 2026
A BMW 3 Series costs $55,000 at the dealership. The real price — in the only currency that matters — is 8.6 years of your working life. Here is the derivation.
Deep dive Aug 25, 2026
The number 500 in the S&P 500 promises a wide net. The weighting rule underneath it quietly hands most of your money to ten companies. By year-end 2025
Index Investing Aug 25, 2026
One account lets you deduct the money going in, grow it with zero tax, and pull it out tax free. The IRS built exactly one like that, and most people use
Taxes Aug 20, 2026
An AI-generated summary told me luxury cars lose 48.1 percent of their value in five years. The number is specific, plausible, and does not exist. No
AI Aug 19, 2026
A $400k salary without liquid reserves is not financial security. It is a well-funded fragility — and Nassim Taleb's framework explains exactly why.
Deep dive Aug 18, 2026
One line in the bond market has flipped negative before every US recession in half a century, and it has never once told anyone the date. That line is the
Markets Aug 13, 2026
In 2022 the 60/40 portfolio lost about 17 percent as stocks and bonds fell together, and a wave of headlines declared the strategy dead. The obituary was
Asset Allocation Aug 12, 2026
Most engineers calculate their compensation correctly and their commute cost completely wrong. Here is the full derivation — to the dollar.
Deep dive Aug 11, 2026
The 4 percent rule survived all but one 30-year period in a century of US market history. That single failure tells you exactly where the rule breaks and
Retirement Aug 6, 2026
Two investors earn the same 30 yearly returns in a different order. One ends with 13.6 million dollars. The other runs out of money. Only the sequence
Foundations Aug 5, 2026
Most engineers optimize for income or status. Both are corrupted root constraints. Here is the only one that produces freedom as a deterministic output.
Deep dive Aug 4, 2026
Before any clever tax strategy, the 401(k) has one rule that beats them all: capture the full employer match. Here are the 2026 limits and how the account actually works.
Tax-Advantaged Accounts Aug 4, 2026
In December 1996 the Fed chairman warned of irrational exuberance. Anyone who sold that day watched the S&P 500 double before the crash came. That episode
AI Jul 30, 2026
The Tax-Free Savings Account is the rare account with no catch: money grows tax-free and comes out tax-free. Here is how the 2026 room works, and the mistakes that cost people.
Tax-Advantaged Accounts Jul 30, 2026
The number traders call the fear index measures no fear at all. It measures the price of S&P 500 options, and its worst readings have marked some of the
Markets Jul 29, 2026
A 1 percent annual fund fee sounds like a rounding error. On 100,000 dollars invested for 30 years at a 7 percent gross return, it quietly removes about
Index Investing Jul 29, 2026
You spend capital to generate a signal. Engineering rule: a signal nobody receives has zero value. The data proves luxury cars fail this test completely.
Deep dive Jul 28, 2026
The IRA is the retirement account you open yourself, no employer required. Here is the 2026 limit, when the deduction is actually allowed, and how it pairs with a 401(k).
Tax-Advantaged Accounts Jul 25, 2026
Multiply a home's price by 5 percent, divide by 12, and compare the result to a month's rent. That single line decides more of the buy-versus-rent
Housing Jul 23, 2026
The RRSP gives you a deduction today and taxes you later. That is a loan from your future self, and whether it is a good deal depends entirely on one comparison.
Tax-Advantaged Accounts Jul 22, 2026
Why self-control beats stock-picking, six-figure salaries, and every optimization strategy you have ever considered
Deep dive Jul 21, 2026
The Roth IRA takes after-tax money and never taxes it again, not the growth, not the withdrawals. Here is the 2026 limit, the income phase-out, and the backdoor for high earners.
Tax-Advantaged Accounts Jul 17, 2026
In 2008 the S&P 500 lost about half its value, and 10-year Treasuries gained about 20 percent over the same months. That offset is the whole reason a
Asset Allocation Jul 16, 2026
The First Home Savings Account gives you a tax deduction on the way in and tax-free money on the way out. For a first home, that combination is unmatched.
Tax-Advantaged Accounts Jul 15, 2026
Net worth is a lagging indicator. Savings rate is the only metric that actually predicts your financial future — and almost everyone has this backwards.
Deep dive Jul 14, 2026
The Health Savings Account is the only account that is deductible going in, tax-free while it grows, and tax-free coming out. Here is the 2026 limit and the stealth-retirement trick.
Tax-Advantaged Accounts Jul 11, 2026
Over the 30 years ending 2026, 10,000 dollars in the S&P 500 grew to about 110,000 on price alone and about 187,000 with dividends reinvested. Most
Foundations Jul 8, 2026
FV = P × (1+r)ⁿ tells you exactly which variable to optimize. Almost everyone optimizes the wrong one.
Deep dive Jul 5, 2026
Your fund's expense ratio is printed on every statement. The larger cost is not, and in a taxable account it can eat a quarter of your thirty-year balance
Foundations Jul 1, 2026
Why small daily financial decisions are not small at all — and how to engineer the compounding forces in your favor
Deep dive Jun 24, 2026
The brutal arithmetic of doubling periods, and why no amount of catch-up saving can undo a delayed start
Deep dive Jun 17, 2026
How a 1-degree error in your savings rate compounds into a financial canyon — and what it takes to correct your heading
Deep dive