Investment research began as a human craft.
The analyst read the balance sheet, visited the factory, called the CFO. Judgement was everything. Edge came from access, experience, and the quality of your thinking relative to the person on the other side of the trade. The best investors were, above all, careful readers of the world.
This era produced the foundational vocabulary of investing — value, growth, quality, momentum — and the mental models that still underpin how we understand markets today. But it was limited by the bandwidth of the human mind: one analyst, one notebook, one thesis at a time.
The quantitative revolution changed the scale of what was possible.
Systematic models could test a hypothesis across decades of data in seconds. Factor frameworks replaced individual conviction with repeatable process. The computer did not replace the researcher — it amplified them, letting a small team operate at the scale of thousands of instruments across dozens of markets simultaneously.
This is the era PartIII was founded in. We built proprietary research infrastructure, execution systems, and risk frameworks designed to run systematic strategies at institutional scale. Cambridge mathematics gave us the rigour. Engineering gave us the reach.
But the computer, however powerful, only does what it is told. The model is only as good as the hypotheses fed into it. Research was still, at its core, a human act — the machine simply made it faster.
The third generation is arriving now — and it changes everything.
Agents do not merely execute instructions. They form hypotheses, gather evidence, challenge assumptions, and synthesise conclusions — continuously, in parallel, across every market, every data source, and every portfolio simultaneously. The distance from question to insight collapses. Research that once took a team of analysts a quarter can be done overnight.
But agents cannot operate without a foundation. They need unified data, institutional context, rigorous controls, and the mathematical backbone to evaluate what they produce. The firms that will lead this era are not those with the most agents — they are those with the deepest research culture and the infrastructure to deploy agents responsibly.
We named this firm Part III because we always intended to build it here — at the frontier where rigorous mathematics meets the next generation of investment research.
The Cambridge Part III is the year the mathematician stops learning and starts doing. That is what this era demands of every firm in our industry: stop preparing, and start building. We have been building since 2009. The tools have finally caught up.