3% eats 26% in 10yr
Inflation: causes, history, and what the data shows
US inflation has averaged roughly 3% annually since 1913. Notable spikes include the 1970s stagflation (peak 14% in 1980), the 2021-2023 post-pandemic surge (peak 9% in 2022), and isolated WWI/WWII episodes. Causes generally fall into demand-pull (too much money chasing too few goods) and cost-push (supply shocks like oil or wages).
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Try calculatorKey takeaways
04 · ideas- US average inflation: 3.1% since 1913; post-1990: 2.5%
- Hyperinflation (50%/month+) has occurred 57 times in history
- The 1970s stagflation took 10 years and a deep recession to cure
- At 3% inflation, $100 buys what $74 buys today — in just 10 years
Inflation means prices rising over time, which means your money buys less. At 3% annual inflation:
- $100 today → buys what $97 buys next year
- $100 today → buys what $74 buys in 10 years
- $100 today → buys what $54 buys in 20 years
Why does inflation happen?
The simplest explanation: too much money chasing too few goods.
Three main causes:- Demand-pull: Economy grows fast, people spend more, prices rise
- Cost-push: Production costs rise (oil prices, wages), companies pass on the cost
- Monetary: Central banks create money faster than economic growth supports
Small, predictable inflation (2%) is considered healthy — it encourages spending over hoarding, makes debt easier to service, and gives central banks room to cut rates in recessions.