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The calculation
In its simplest form (CAPM):
Alpha = Rp − [Rf + β × (Rm − Rf)]
- Rp = portfolio return.
- Rf = risk-free rate.
- β = portfolio's market beta.
- Rm = market return.
The portfolio's return minus what its market exposure alone would have produced equals alpha. Multi-factor models extend this by removing exposures to other systematic factors as well.
What looks like alpha but isn't
- Factor exposure — a value-tilted portfolio outperforming during a value rally is not generating alpha; it is rented value beta.
- Smoothed returns — strategies with infrequent valuation can appear to have alpha that vanishes under proper mark-to-market.
- Benchmark mismatch — outperforming the wrong benchmark looks like alpha until the right benchmark is used.
- Survivorship bias — published track records exclude dead funds; the surviving averages overstate the typical experience.
Why alpha is hard to find
Markets are competitive. For one investor to earn alpha, another must underperform — alpha is zero-sum across all investors before fees, and negative-sum after fees. Empirical research consistently shows that most active managers underperform their benchmarks net of fees over long periods. The few who outperform are difficult to identify in advance.
Alpha in advisory practice
Most retail advisory work does not aim to generate manager-level alpha. The advisor's value comes from financial planning, behavioral coaching, tax efficiency, asset location, and structural decisions — areas where the average advisor empirically does add measurable value to client outcomes. Selling "we generate alpha" as the value proposition is both empirically weak and unnecessary.
How StratiFi thinks about alpha
Alpha is a useful analytical concept and a poor marketing claim. The firms that hold up under examination — and that build durable client trust — focus on the value they actually deliver: defensible decisions, audit-ready documentation, behavior coaching, and the structural choices that compound over decades. That value is real and measurable; persistent manager alpha is rare and usually unverifiable.
Frequently asked questions
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Do most active managers generate alpha?
Empirical research consistently shows most active managers underperform their benchmarks net of fees over long periods. The exceptions are real but small in number and difficult to identify in advance. -
Is alpha the same as outperformance?
Outperformance includes alpha plus factor and beta tilts. Alpha is specifically the residual after adjusting for systematic exposures. A portfolio can outperform with no alpha if its outperformance is fully explained by beta or factor tilts. -
Should advisors emphasize alpha to clients?
Best practice is to emphasize the parts of the advisor's value proposition that are empirically consistent — planning, tax efficiency, behavior coaching, structural decisions. Alpha claims are difficult to substantiate and create exposure if challenged.