Observed arrival · 2026-11-03
ETFsonar: an ETF technical inspection
ETFsonar presents free browser tools for ETF fees and index composition, alongside a forthcoming iPhone app for examining portfolio holdings, overlaps, and costs.
- For
- ETF investors checking an existing portfolio
- Worth noticing
- The sample portfolio is explicitly fictitious; the project says figures show their source, date, and calculation, while swap ETFs expose two layers.
Field notes
The app workflow starts with an ETF name, ticker or ISIN and the amount held, then rolls positions into country and company exposure, shared holdings, fees, and swap-fund layers. The page separates issuer holdings from the exposure delivered by a swap and proposes tracking fee, index, and merger changes. Screens use a fictitious portfolio; the site says each figure can be opened to show its source, date, and calculation. Essential and Expert modes are described, but the iPhone app is still marked as forthcoming.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
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