Quantitative research firm

Terabytes in. Signal out.

We turn market complexity into actionable conviction — research and infrastructure, with the noise filtered out.

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BlackMonday Connector

Financial data to your Claude and ChatGPT.

No code.

In development
Claude
ChatGPT

Your AI is brilliant at everything except money — because it's guessing. BlackMonday Connector gives it institutional-grade financial data: ask about any company, sector, or portfolio and get answers grounded in real data.

Research

Named for the worst day.
Built for every other one.

Nothing leaves the desk until the signal survives the data.

Deep coverage.
Clean data.
A long memory.

12TBMarket & filings data
~190MFundamental data points
30+Years of market & filing history
About

An independent quantitative research firm.

BlackMonday builds the research systems behind a markets desk and data infrastructure for builders.

We belong to a new generation of quantitative firms — where the systems do the reading, at a scale and pace no desk could match, and the people do the judging. Founded in 2026, privately held, and accountable only to the research.

Founded
2026
Coverage
8,500+ companies
Structure
Privately held
A message from the desk

Our Principles

When markets turn turbulent, we find clarity, not doubt.

Edge in Extremes

Field Notes

Research notes from the desk, in your inbox.

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