Data Foundation
Instrument identity, vendor facts, calendar logic, warehouse compute, point-in-time design and source-to-decision lineage.
OneBook
The decision intelligence layer above your investment stack.
OneBook connects the state investment teams need to trust: point-in-time data, portfolio decisions, risk runs, research definitions, thesis context, reporting outputs, API/SDK/MCP access and audit evidence.
Instrument Master Identity
Warehouse Facts + compute
User State Decisions
Audit Evidence
What OneBook owns
One evidence layer, six investment surfaces.
The platform should be evaluated as a decision evidence layer above existing systems, not as a generic all-in-one suite. Each surface answers a concrete buyer question.
Portfolio State
IBOR state, portfolios, watchlists, order intent, overrides, NAV and return series available through UI, API, SDK and MCP.
Risk & Performance
Same-book exposures, drawdowns, factor returns, attribution, benchmark comparison, scenario review and risk evidence.
Research-to-Decision
Thesis state, evidence requirements, regime detection, monitor rules, watchlist decisions and Decision Packets.
Audit & Lineage
Evidence for who changed, viewed, exported, reported, queried through API/MCP or acted on restricted state.
Reporting Truth
Reports and Decision Packets that point back to the same portfolio, risk and data evidence.
What OneBook does not replace
Keep Bloomberg, the OMS, the custodian and the fund admin.
OneBook does not need to become the terminal, official book, accounting engine or administrator. Those systems produce important state. OneBook makes the investment layer able to reconcile, reproduce and defend that state.
- Reduce research-production drift.
- Make backtests and reports explainable.
- Give risk the same portfolio truth as the PM.
- Let operations inspect breaks, exports and recurring controls.
- Give compliance and leadership evidence when decisions, API calls or agent workflows are reviewed later.
Operating model
Built from a clear data ownership model.
Instrument Master
Owns identity and asset_id resolution.
Warehouse
Owns market facts, metrics, factor returns, attribution and reproducible compute.
User State
Owns portfolios, watchlists, order intent, overrides and thesis decisions.
Audit
Records decision writes, exports, reports and cross-boundary actions.
Product proof
Show the evidence, not only the promise.
Next step
See how OneBook would sit inside your current stack.
The useful demo is not a generic tour. It is a walkthrough of the place where your current stack loses trust.
Request Demo