Start with concentration, not brand
Top-10 weights, sector caps, and single-country dominance tell you where risk lives. A broad index can still behave like a handful of stocks in certain cycles.
Map rebalance and turnover
Rebalance rules create predictable flows. Understand whether the index is float-adjusted, capped, or sampled — the methodology section is not boilerplate.
Pair factsheets with scenario research
Once you know what you own, ask how macro, rates, flows, and psychology might stress those weights. That is where Cognitor’s six Panel lenses and SENIOR stack are designed to help — on the monitored 40 US-listed ETF universe, weekly.