IWB vs IWM · 2000—NOW — Large Caps vs. Small Caps Since 2000: Russell 1000 vs. Russell 2000
Mega-Cap vs Small-Cap Cycles — Russell 1000 against Russell 2000 total return since 2000.
The plate
Total return of the Russell 1000 (IWB) and the Russell 2000 (IWM) since May 2000, $100 each with dividends reinvested. The original study argues that periods of rising concentration give large-cap leaders a valuation premium over small caps; over this span the lead has changed hands more than once.
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 Large Caps vs. Small Caps Since 2000: Russell 1000 vs. Russell 2000 panel and links to the full interactive chart.
Total return of the Russell 1000 (IWB) and the Russell 2000 (IWM) since May 2000, $100 each with dividends reinvested. The original study argues that periods of rising concentration give large-cap leaders a valuation premium over small caps; over this span the lead has changed hands more than once. The data is refreshed by the History of Market pipeline and published as a stable JSON endpoint for research, citation, and AI-agent use.
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 each weekend. 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.