LankaBangla Securities: A Governed, Air-Gapped LLM Layer for Capital Markets

The challenge

Relationship managers, brokers, and dealers need fast, conversational access to market data and client portfolios — but giving a language model direct, unconstrained access to production financial systems is not acceptable in a regulated capital-markets environment.

Our approach

Ternary is designing a governed application layer around an air-gapped model — provider-neutral by design, so it can run on a managed service or an open-weight model on dedicated infrastructure. The model never touches raw systems; it works through a curated catalog of approved questions behind a strict data boundary.

What it includes

The design pairs a deterministic validation layer with a secondary "LLM-as-judge" check, role-scoped access so each advisor only reaches data they are permitted to see, and full audit logging. A web workspace gives advisors a chat experience, a discovery view, and saved insights, with safety benchmarked against a purpose-built test set.

Where it stands

The engagement is in its design and architecture phase, with the application layer and governance model defined ahead of build.