IWB vs IWM · 2000—NOW — Twenty-six years of large over small
Large vs small caps — Russell 1000 over Russell 2000 — twenty-six years of dominance.
Russell 1000 (IWB) vs Russell 2000 (IWM) total return, 100 invested in May 2000. Rising concentration means large-cap years.
What this page answers
This static page is built to answer searches for IWB vs IWM · 2000—NOW. It summarizes the live dataset behind the Twenty-six years of large over small panel and links to the full interactive chart.
Russell 1000 (IWB) vs Russell 2000 (IWM) total return, 100 invested in May 2000. Rising concentration means large-cap years. The data is refreshed by the History of Market pipeline and published as a stable JSON endpoint for research, citation, and AI-agent use.
The plate
Latest Snapshot
- Updated
- 2026-08-25
Data & Source
GET /api/latest/concentration.json — Canonical dataset endpoint.
Exchange closing prices · Company filings · Robert Shiller · FRED · NBER.
FAQ
Where does this data come from?
History of Market combines public market and macro datasets — exchange closing prices, company filings, Robert Shiller, FRED, NBER, and the UBS Global Investment Returns Yearbook (Dimson–Marsh–Staunton). The exact endpoint for this panel is linked below.
How often is it updated?
Daily-tier datasets refresh after the U.S. market close, with a broader weekly refresh on Sunday. The timestamp shown on this page comes from the JSON payload.
Can I use the data?
Yes, for research and education with attribution to History of Market. Upstream data sources retain their own terms.