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Beta measures security volatility relative to market: β > 1 more volatile than market, β < 1 less volatile, β = 1 matches market.
Guida passo passo
- 1Calculate historical returns vs. market index
- 2Compute covariance of returns
- 3Divide by market variance
Esempi risolti
Ingresso
Tech stock β = 1.5
Risultato
50% more volatile than market
Higher risk/reward potential
Errori comuni da evitare
- ✕Assuming high β always risky (opportunity matters)
- ✕Using short lookback periods
Domande frequenti
Should beta guide investment?
No alone; consider alpha (excess return), fundamentals, diversification.
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