Observed arrival · 2026-09-03
TickerInside: the ETF holdings x-ray
A free research tool showing what 568 US ETFs hold, how funds overlap, and which securities contribute to a portfolio's exposure and risk.
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Field notes
The service derives fund-level measurements from issuer holdings files and end-of-day prices, retaining the date attached to each source rather than flattening different reporting schedules into one timestamp. Its coverage is broad enough to expose 161,028 possible fund pairs, while the API provides free JSON without a key under CC BY 4.0. Portfolio x-ray results are framed as measurements of holdings and behavior, not investment advice.
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○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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