Top-down vs bottom-up

There are two directions you can travel when you analyse a company, and good analysts use both.

Top-down

A top-down analysis starts wide and narrows:

1. The economy — growth, interest rates, inflation, employment. Are conditions a tailwind or a headwind?
2. The sector — which industries benefit from those conditions? A rising-rate environment helps banks and hurts heavily indebted utilities.
3. The company — within an attractive sector, which specific business is best placed?

Top-down is how you avoid owning a fine company in a doomed industry. It frames the context.

Bottom-up

A bottom-up analysis ignores the macro mood at first and starts with the company itself: is this an excellent business at a fair price? Bottom-up investors argue that a truly great company can thrive in almost any economy, so they would rather find the great company than time the cycle.

Using both

In practice the two meet in the middle. You might form a top-down view that a theme is attractive — say, the long shift to electric vehicles — then go bottom-up to find the one or two businesses inside that theme with the best economics and the strongest position.

Neither direction is "correct". Top-down protects you from macro and industry traps; bottom-up keeps you anchored to business quality. Knowing which lens you are using — and deliberately checking with the other — is the mark of a disciplined analyst.