RuleOne

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030 · Inflation and How Compound Interest Can Work Against You Or For You

2015-11-03 · 41 minUnderstand

In one sentence: Inflation compounds against your spending power just as returns compound in your favour, and the best long-run defence is owning businesses with a moat that lets them raise prices.

Key ideas

How it maps to RuleOne

Buffett, Munger and Graham links

Words to know

Try this

Using the Rule of 72, work out how long it takes your current living costs to double at 3.6%, and at 2%. Then pick one company on /stocks/ and check whether its gross margin held through the last high-inflation year.

Check yourself

  1. Why does 3.6% inflation double prices in 20 years, not 72% higher?
    AnswerEach year's increase applies to the previous year's higher price, so it compounds.
  2. Which kind of business does Phil say protects against inflation?
    AnswerOne with a moat that lets it raise prices, such as Coca-Cola or See's Candy.
  3. Name two places compounding works against you.
    AnswerInflation, credit cards (also student loans, tax penalties).

Short quotes

"There's no better inflation protection than long-term investing in the stock market." (Phil, ~32:30, auto-transcribed)

inflationcompoundingpricing powermoatsalary dependenceside incomecredit card debtretirement

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AI study notes from an automatic transcript. Names and figures may be misheard, and quotes are short excerpts for study. Not investment advice.