Index funds & ETFs
Owning the whole market instead of picking within it. The most consequential financial invention of the last fifty years.
The invention
The problem. Most active managers underperformed the market after fees, consistently, and clients were paying for it anyway.
Jack Bogle launched the first retail index fund in 1976 to widespread derision — competitors called it un-American to settle for average. The first ETF followed in 1993. Together they moved trillions from active management to passive ownership and cut the cost of investing by an order of magnitude.
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Stock ticker
The ticker made continuous public prices possible, which is the precondition for indexing anything.
Where it has failed
Not a list of disasters. A pattern library.
- 2010New York
The Flash Crash
Several ETFs traded at pennies during a 36-minute dislocation; thousands of trades were cancelled after the fact.
An ETF's price and its holdings' value can separate exactly when you most want to sell.
- 2018United States
Volatility products fail
Inverse volatility ETNs lost most of their value in a single session and were terminated.
The wrapper being an ETF says nothing about the risk inside it. Some are broad ownership; some are leveraged bets.
Where it stands today
You now have the shape. Here is the reading.
Live from public data, pulled at request time. Read it with the failures above in mind — not because a repeat is due, but because knowing the mechanism is what lets you recognise one early.
Total US market (VTI)
Stooq
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S&P 500
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In your ledger
Probably the single largest holding in your retirement account, and the cheapest financial product you will ever be sold.
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