Twelve Months, Twelve Temperaments

This page is the landing card for the Twelve Months, Twelve Temperaments chart — one panel inside History of Market, a century-scale editorial chronicle of the U.S. stock market. The interactive visualization, the surrounding S&P 500 narrative, and cross-references to related panels all live on the main chronicle page; this card carries the same canonical data and links through to it.

The underlying dataset is published as a machine-readable JSON endpoint, refreshed automatically by a daily scraper pipeline and held under a CC BY 4.0 licence. You are welcome to read it, cite it, embed it, or hand it to an AI agent for analysis — attribution to History of Market is the only ask.