# SOX / SPX · SOX / XLK · XLK / SPX — Relative Strength: Semiconductors vs. S&P 500 and Tech

Source: https://historyofmarket.com/semi/semi-ratios/
Language: en
Data through 2026-11-12
License: data CC BY 4.0, text © History of Market — cite "History of Market (historyofmarket.com)" and link the source page. Terms: https://historyofmarket.com/license/
Section: History of Market › Semiconductors › Relative Strength: Semiconductors vs. S&P 500 and Tech

SOX relative to the S&P: 288.7 as of 2026-11-12.

**Semiconductor Relative Strength** — Ratio charts of SOX relative to the S&P 500 and XLK: assessing the semiconductor sector as a global macroeconomic leading indicator.

Figure: Plate III.8 · Ratio curves indexed to year-end 1999 = 100: SOX vs. S&P 500, SOX vs. XLK, and XLK vs. S&P 500. Delineates distinct historical regimes of semiconductor leadership and consolidation. · Data through 2026-11-12

## 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 Relative Strength: Semiconductors vs. S&P 500 and Tech panel and links to the full interactive chart.

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/semi/ratios.json](https://historyofmarket.com/api/semi/ratios.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.

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Data: https://historyofmarket.com/api/semi/ratios.json
Machine index: https://historyofmarket.com/llms.txt