Stonefolio
Investor's guide

How to analyze a stock: the five questions that work

Every sound stock analysis answers the same five questions. Not out of tradition, but because each showed predictive value in the research:

1. Is the price reasonable?

Compare the price/earnings ratio to the company's own 5-year average, not to an absolute number. Cheap versus its own history historically predicted better returns.

2. Is it a good business?

Return on equity and profit margin, compared within the sector. Persistently high ROE is the footprint of a moat — what Buffett hunts for.

3. Is it financially healthy?

The Piotroski F-score (0-9) bundles nine accounting checks; high scores demonstrably outperformed (Piotroski 2000). Also check debt against equity.

4. What do you get paid?

Dividends are part of your return — as long as the payout is sustainable (below ~70% of profit).

5. What is the trend doing?

Price above the 200-day average and positive 12-month momentum — the only technical signals that survived peer review (Faber 2007; Jegadeesh & Titman 1993).

For the most-searched stocks we have already filled in these five steps with today's numbers — see the guide index.

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