Alpha
What Is Alpha?
Alpha is a measure of an investment’s performance relative to a benchmark index. It represents the excess return that an investment generates after adjusting for the risk taken.
In portfolio management, alpha is often used to evaluate the skill of an investment manager or strategy.
Why It Matters
Alpha helps investors determine whether an investment has outperformed or underperformed the market. A positive alpha indicates that the investment delivered returns above the benchmark, while a negative alpha suggests it underperformed.
Investors often look for funds or strategies that consistently generate positive alpha.
How Alpha Works
Alpha compares the return of an investment to the return of a benchmark index after accounting for market risk.
For example:
- Alpha of +2 means the investment outperformed the benchmark by 2%.
- Alpha of –1 means the investment underperformed the benchmark by 1%.
Portfolio managers aim to generate alpha through security selection, market timing, or strategic asset allocation.
Example
If a mutual fund earns a 12% annual return while its benchmark index returns 10%, the fund has generated an alpha of +2%.
Alpha vs Beta
- Alpha measures excess return relative to a benchmark.
- Beta measures the sensitivity of an investment’s price movements relative to the market.
FAQs About Alpha
Is positive alpha good?
Yes. It indicates the investment outperformed its benchmark.
Can alpha be negative?
Yes. This means the investment performed worse than the benchmark.
Do index funds generate alpha?
Typically no. Index funds aim to match benchmark performance rather than outperform it.
Related Terms
