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Detail of The Harvesters by Pieter Bruegel the Elder: farm workers resting beneath a pear tree beside sheaves of wheat.
Detail · The Harvesters, Pieter Bruegel the Elder, 1565

Investing·5 min read

Compound Interest, Explained With Numbers You'll Actually Remember

Forget the formula. Three numbers, 72, 7 and 40, tell you almost everything about how money grows and how debt grows faster.

Read the lesson

Detail of The Milkmaid by Johannes Vermeer: a kitchen maid pouring milk into a bowl beside a basket of bread.Detail · The Milkmaid, c. 1660

Saving·4 min read

How Big Should Your Emergency Fund Actually Be?

'Three to six months' is the rule. Here's how to find your number, and where to park it so it isn't quietly losing to inflation.

Detail of The Syndics of the Drapers' Guild by Rembrandt: guild officials in black hats reviewing an account book.Detail · The Syndics of the Drapers' Guild, 1662

Investing·6 min read

Index Funds for Beginners: The 10-Minute Version

What an index fund is, why fees matter more than you think, and the two-fund portfolio that beats most professionals.

Detail of The Moneylender and His Wife by Quentin Metsys: a banker weighing gold coins on a small scale.Detail · The Moneylender and His Wife, 1514

Credit·5 min read

What Actually Moves Your Credit Score (and What Doesn't)

The five factors behind a FICO score, weighted, plus the two fastest fixes most people never use.

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Background · The Moneylender and His Wife, Quentin Metsys, 1514

From the archive

Every lesson so far

  1. ICompound Interest, Explained With Numbers You'll Actually Remember
  2. IIHow Big Should Your Emergency Fund Actually Be?
  3. IIIIndex Funds for Beginners: The 10-Minute Version
  4. IVWhat Actually Moves Your Credit Score (and What Doesn't)
  5. VLump Sum or Dollar-Cost Averaging? What the Data Says
  6. VI5 Side Hustles That Actually Scale (and 3 That Don't)
  7. VIIThe 50/30/20 Budget: Does It Still Work in 2026?