Why the economy moves in cycles

"History doesn't repeat itself, as Mark Twain said — it rhymes; things come back but they don't quite come back in the same form."

History doesn't repeat itself, as Mark Twain said — it rhymes; things come back but they don't quite come back in the same form.

Expansions and recessions aren't anomalies: they're the natural consequence of how credit builds up and unwinds, as described in the previous lesson, and recognizing them helps explain why even good companies go through rough patches that have nothing to do with them.

The short-term economic cycle usually lasts a few years: credit expands, spending and prices rise, then central banks step in to cool the economy down once inflation runs too hot, spending slows, and a contraction phase begins. After a while, the cycle starts over.

There's also a longer cycle, measured in decades: total debt across households, businesses, and governments grows faster than income for an extended period, until repaying it becomes unsustainable and a deeper correction is needed - what financial news often calls a debt crisis or a severe recession.

For someone investing with a value approach, the economic cycle isn't something you need to predict correctly, but one more reason to insist on a margin of safety: a company bought at a price that already discounts a tough phase holds up better in a slowdown than one bought at a price that assumes the good times will last forever.