Modern Portfolio Theory

PORTFOLIO THEORY APPROACH: BETA AND PREMIUMS

Modern finance theory uses the “capital asset pricing model” (CAPM) to estimate discount rates for equities.

Using CAPM requires estimating two inputs in addition to a risk-free rate. These are a “market risk premium” and “beta,” a measure of stock price volatility seen by backers as a risk indicator.
The mistake some analysts make is to assume that there is a single accurate data point for each of these inputs. However, each of these variables is an estimate requiring judgment.



Also read:

1. Understanding Discount Rates
2. Risk-free rate
3. Traditional Method: Discount rate or WACC (I)
4. Traditional Method: Discount rate or WACC (II)
5. Modern Portfolio Theory
6. Portfolio Theory: Market Risk Premiums
7. Portfolio Theory: Beta
8. Is the market efficient, always?
9. Discount Rate Determinations: Summary