SOX / SPX · SOX / XLK · XLK / SPX — Who's leading, who's lagging
Three rebased ratios, indexed to 100 at year-end 1999. Semis vs the broad market, semis vs the broader tech sector, and tech vs the broad market. Click any legend entry to toggle a line; zoom in to read each leadership regime.
What this page answers
This static page is built to answer searches for SOX / SPX · SOX / XLK · XLK / SPX. It summarizes the live dataset behind the Who's leading, who's lagging panel and links to the full interactive chart.
Three rebased ratios, indexed to 100 at year-end 1999. Semis vs the broad market, semis vs the broader tech sector, and tech vs the broad market. Click any legend entry to toggle a line; zoom in to read each leadership regime. The data is refreshed by the History of Market pipeline and published as a stable JSON endpoint for research, citation, and AI-agent use.
Latest Snapshot
- Updated
- 2026-05-11
Static Preview
Data & Source
GET /api/semi/ratios.json — Canonical dataset endpoint.
Yahoo Finance · Macrotrends · Robert Shiller · FRED · S&P Global · Nasdaq · NBER.
FAQ
Where does this data come from?
History of Market combines public market and macro datasets including Yahoo Finance, Macrotrends, Robert Shiller, FRED, S&P Global, Nasdaq, and NBER. 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.