TOP 10 · CO-OCCURRENCE + PAIRS — Who sat next to whom — across how many decades
Longest co-tenures — Which pairs shared the top 10 for the most decades.
Pair the long-lived firms and count the decades they shared the room. GE × AT&T was a seven-decade pairing; IBM × Exxon, five. Square size and ink density scale with shared decades; the diagonal carries each firm's own century rhythm.
What this page answers
This static page is built to answer searches for TOP 10 · CO-OCCURRENCE + PAIRS. It summarizes the live dataset behind the Who sat next to whom — across how many decades panel and links to the full interactive chart.
Pair the long-lived firms and count the decades they shared the room. GE × AT&T was a seven-decade pairing; IBM × Exxon, five. Square size and ink density scale with shared decades; the diagonal carries each firm's own century rhythm. 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
Data & Source
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.