Turn filings into testable cohorts
Define a cohort from the filing event you care about, add deal terms and listing fields, then test what happened after that date.
Keep active candidates, follow-ons, and post-listing outcomes separate so a screen does not accidentally compare different kinds of opportunities.
curl -H "Authorization: Bearer $IPOGRID_API_KEY" \
"https://ipogrid.com/api/v1/companies?scope=all&kind=operating&offering_status=effective&include=latest_terms,classification,consensus"
curl "https://ipogrid.com/api/charts?metric=day1_return_pct&group=sector&bucket=week&scope=all&range=26w"
curl -H "Authorization: Bearer $IPOGRID_API_KEY" \
"https://ipogrid.com/api/v1/filings?form_type=424B4&filing_date_from=2026-06-01&include=company,terms"
curl -H "Authorization: Bearer $IPOGRID_API_KEY" \
"https://ipogrid.com/api/v1/outcomes?trading_start_date_from=2026-06-01&trading_start_date_to=2026-06-30"
Backtest shape
Freeze the cohort definition first: issuer kind, filing form, filing date window, offering status, exchange, deal size, and trading status. Join market bars and outcomes only after the cohort date so future information does not leak into the test.
For historical tests, prefer the filing events and market bars available around the event date instead of a latest-current snapshot.