The legacy is not a model. It is an operating philosophy.

When people remember Barr Rosenberg, they often remember quantitative models and factor investing.

I remember something broader.

I remember an operating philosophy.

His work demonstrated that computing power could do more than make calculations faster. It could help connect the different stages of investment management into a coherent process.

Data.

Research.

Portfolio construction.

Optimisation.

Risk.

Trading.

Operations.

Compliance.

Not separate kingdoms. Not departments throwing files over walls.

One machine. One process. One purpose.

Working with Barr also left me with a cultural principle that mattered just as much as the technology.

I remember the torn yellow shirt and his apparent indifference to convention. I remember him telling me, before a meeting, to ask whether the people I was meeting expected a suit or whether I could arrive casually.

My recollection is that his point was not that formality was wrong. It was that appearance should never be confused with substance.

What mattered was whether somebody was prepared to listen to the idea rather than judge the packaging.

The lesson I took from him was simple: when somebody entrusts you with billions, the quality of your thinking matters more than the quality of your tie.

That was not eccentricity.

It was a hierarchy of values:

Substance above appearance.

Competence above status.

Results above theatre.

For me, the most important part of Barr Rosenberg's legacy is therefore not a proprietary formula that can be copied.

It is the principle that investment management can be designed as an integrated system in which technology absorbs avoidable labour and human beings are reserved for judgement, responsibility and insight.

That principle feels more relevant today than when those systems were first pioneered.

Computing power is vastly greater. Cloud infrastructure exists. Databases, APIs, optimisation engines and automation are mature.

There is less technological justification than ever for fragmented processes.

The remaining question is whether the industry has the organisational courage to follow the logic of the technology.

PoMaTo was created in part from experience shaped by that operating philosophy.

We are not trying to recreate AXA Rosenberg.

We are trying to carry forward the idea that made it extraordinary.

Fabio Agostini

Chief Executive Officer & Co-Founder

PoMaTo