---
title: Portfolio Alpha
slug: portfolio-alpha
url: https://templeton.host/lexicon/portfolio-alpha/
type: defined-term
inDefinedTermSet: https://templeton.host/lexicon
author: Andrew Templeton
---

# Portfolio Alpha

## Definition

The excess return that exists only when the allocation decision and the operating execution are both right. Brinson performance attribution splits a portfolio's active return into an allocation effect (did you weight the right bets?) and a selection effect (did each bet perform?); portfolio alpha is the interaction the two lenses miss alone - you have to fund the right edges AND have operated the P&L well enough to capture them.

## Why this term exists

An allocator who cannot operate funds the right bets and watches the organization fail to capture them. An operator who cannot allocate executes flawlessly on bets that should never have been funded. Portfolio alpha is the interaction term: it takes knowing which bets to make and having the operating muscle to extract the return. Neither capability prices it alone.

## See also

- [Operational Alpha](https://templeton.host/lexicon/operational-alpha)
- [Construction Spread](https://templeton.host/lexicon/construction-spread)
- [The Conviction Fraction](https://templeton.host/lexicon/conviction-fraction)
- [Causal Yield](https://templeton.host/lexicon/causal-yield)
- [Directed Graph](https://templeton.host/frameworks/directed-graph)

Canonical URL: https://templeton.host/lexicon/portfolio-alpha/