Blog
Latest from Protos Systems
Product updates, technical notes, and announcements about Arche and deterministic financial data infrastructure.
Introducing Arche: Deterministic EDGAR Intelligence for Developers
Arche transforms regulatory filings into deterministic financial datasets with point-in-time correctness, restatement tracking, and filing lineage.
Category: Product
Why Deterministic Financial Data Matters
Financial models fail when historical filing-derived data is overwritten. Deterministic datasets preserve lineage so backtests, research, and audits remain reproducible.
Category: Data & Research
AAPL · Income Statement
Conceptual view of versioned statements (illustrative)
Revenue
Change captured as a first-class event (not an overwrite)
How Arche Handles Financial Restatements
Arche preserves filing lineage during restatements so historical analysis stays reproducible and point-in-time correct.
Category: Engineering