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All 16 learnings · one per slide
Common Sense
Investing
John C. Bogle, in bytes
16 key learnings from Vanguard founder John Bogle on why index funds win.
16 learnings · ~40 sec eachSwipe →
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The Little Book of Common Sense Investing, in bytes
16 key learnings from John Bogle's short case for owning the whole market at the lowest possible cost. Each takes about 40 seconds to read. Swipe, use the arrows, or your keyboard.
Common Sense
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Learning 1
The Gotrocks Family
The parable
A wealthy family owns all the companies and gets all the returns, until 'Helpers' persuade them to trade with each other and pay fees.
The result
The family's share of the returns shrinks by exactly what the Helpers take.
Takeaway
Trading among ourselves doesn't add returns; it adds costs.
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Learning 2
Owning the Market
The idea
Investors as a group earn the market's return before costs, and less after costs.
Example
For every winner beating the market, someone else loses.
Takeaway
Beating the market is a zero-sum game before costs.
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Learning 3
Where Returns Come From
The idea
Over time, stock returns come from dividends and earnings growth. Speculative return from changing valuations evens out.
Example
Valuations rise and fall, but business growth drives long-term returns.
Takeaway
Focus on business returns, not speculation.
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Learning 4
The Relentless Rules of Arithmetic
The idea
Costs compound against you just as returns compound for you.
Example
A 2% annual cost can eat a large share of returns over 50 years.
Takeaway
Costs matter enormously.
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Learning 5
Buy the Haystack
The idea
Don't look for the needle in the haystack. Buy the whole haystack.
Example
A total stock market index fund owns nearly every company.
Takeaway
Own everything, cheaply.
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Learning 6
Most Funds Lose
The idea
Most actively managed funds underperform index funds over long periods.
Example
Of hundreds of funds over decades, only a handful beat the index.
Takeaway
The odds favour indexing.
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Learning 7
Reversion to the Mean
The idea
Star funds and hot sectors tend to fall back towards average.
Example
Top funds one decade are often mediocre the next.
Spot it
Chasing last year's winners.
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Learning 8
Selecting Stars Fails
The idea
Past performance doesn't predict future performance.
Example
Ratings and rankings don't reliably pick future winners.
Takeaway
Ignore past returns.
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Learning 9
Dividends Matter
The idea
Dividends have been a large part of total stock returns.
Example
Reinvesting dividends over decades.
Takeaway
Don't ignore dividends.
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Learning 10
Taxes and Turnover
The idea
Active trading creates taxes, which reduce returns further.
Example
Index funds trade little and are tax-efficient.
Takeaway
Low turnover helps.
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Learning 11
ETF Caution
The idea
Bogle warns that exchange-traded funds encourage frequent trading and narrow bets.
Example
Trading ETFs like stocks.
Takeaway
Use ETFs to hold, not trade.
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Learning 12
Bonds
The idea
Bond index funds give stability and low costs.
Example
Holding a bond index fund for balance.
Takeaway
Index bonds too.
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Learning 13
Asset Allocation
The idea
Adjust stocks and bonds to your age and risk tolerance.
Example
Bogle suggests holding roughly your age in bonds as a rough guide.
Takeaway
Balance risk over your lifetime.
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Learning 14
Buffett's Advice
The idea
Warren Buffett has recommended low-cost index funds for most investors.
Example
His instructions for his heirs put most money in an S&P 500 index fund.
Takeaway
Even the best investor recommends indexing.
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Learning 15
Simplicity
The idea
A simple portfolio of a few index funds is enough.
Example
Stock and bond index funds.
Takeaway
Keep it simple.
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Learning 16
Stay the Course
The idea
Bogle's motto: buy, hold, and stay the course through ups and downs.
Example
Not reacting to market crashes.
Reflect
Can you hold through a crash?
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All 16 learnings complete
That’s all 16 learnings.
Don't look for the needle; buy the haystack. How much are fees taking from your returns?
Abhay Kumar JaiswalFCA · PMP® · Workday Financeabhayjaiswal.com
Summaries in my own words. Read the book for the full stories.
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Summaries are written in my own words for learning. Read The Little Book of Common Sense Investing by John C. Bogle (2007) for the full stories. These bytes summarise the book; they are not financial advice. More Books in Bytes