Insider Alpha · Research methodology

How We Build the Data, Signals, and Strategy Research

We explain exactly what we measure, how we measure it, and where the numbers can go wrong. Public filings stay free; scored signals and portfolio depth are member value.

Date rules

Transaction date — when the trade occurred per the filing. Filing date — when the disclosure became public. Public entry — next trading day after filing for signal backtests. Median lag in our dataset: 28 days.

Data sources

House Clerk periodic transaction reports, Senate eFD disclosures, and OGE executive branch filings. We link to source PDFs where available.

Signals

Individual buy disclosures scored 0–100 using historical patterns, cluster context, and politician track record. Strong, watchlist, and manual-review tiers feed the member email digest. Not investment advice.