Performance & Return
Alpha
Definition
The return generated above what the portfolio's benchmark or market exposure would have predicted.
Why it matters
It measures whether active decisions added value beyond what passive exposure alone would have delivered.
What most investors miss
The gap between what the term means and how it is usually applied.
They confuse a strong return with alpha. A rising market lifts all portfolios. Alpha only appears when the return exceeds what the market gave for free.
How to read it
Separate the market return component from the active decision component before claiming alpha.
Multi-account lens
How this term reads differently across brokers and accounts.
Calculating alpha across a fragmented portfolio is difficult because it requires a consistent benchmark applied to the consolidated portfolio not to each account separately.
Related terms
Terms that connect to alpha.
Benchmark
A reference index or return used to evaluate whether the portfolio is performing as expected relative to its risk profile.
Sharpe Ratio
A measure of return per unit of risk calculated as excess return divided by the standard deviation of returns.
Portfolio Performance
The overall return of the portfolio over a defined period accounting for all holdings cash and distributions.
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