What is beta and alpha in performance measurement?

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Multiple Choice

What is beta and alpha in performance measurement?

The main idea here is understanding what beta and alpha tell you about a fund’s performance. Beta is about sensitivity to the overall market. It shows how much the fund tends to move with the market, reflecting systematic, or market, risk. If the market moves, the fund’s returns should move in roughly proportional fashion according to its beta. Alpha, by contrast, measures the portion of the fund’s return that isn’t explained by its market exposure. It’s the excess return you’d expect after accounting for beta, i.e., the risk-adjusted performance relative to a benchmark. A positive alpha means the fund added value beyond what its level of market risk would predict; a negative alpha means it did not. Putting them together with an example helps: if the market rises 10% and the fund has a beta of 0.8, you’d expect about 8% from market exposure. If the fund actually returns 9%, the leftover 1% is the alpha (risk-adjusted excess return). If it returns 7%, the alpha is -1%. Beta is not a measure of the risk-free rate exposure, and alpha is not the fund’s total return or a feature like the management fee or turnover. It’s also not merely volatility, since beta is specifically about market-related moves, while volatility is a broader measure of variability.

The main idea here is understanding what beta and alpha tell you about a fund’s performance. Beta is about sensitivity to the overall market. It shows how much the fund tends to move with the market, reflecting systematic, or market, risk. If the market moves, the fund’s returns should move in roughly proportional fashion according to its beta.

Alpha, by contrast, measures the portion of the fund’s return that isn’t explained by its market exposure. It’s the excess return you’d expect after accounting for beta, i.e., the risk-adjusted performance relative to a benchmark. A positive alpha means the fund added value beyond what its level of market risk would predict; a negative alpha means it did not.

Putting them together with an example helps: if the market rises 10% and the fund has a beta of 0.8, you’d expect about 8% from market exposure. If the fund actually returns 9%, the leftover 1% is the alpha (risk-adjusted excess return). If it returns 7%, the alpha is -1%.

Beta is not a measure of the risk-free rate exposure, and alpha is not the fund’s total return or a feature like the management fee or turnover. It’s also not merely volatility, since beta is specifically about market-related moves, while volatility is a broader measure of variability.

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