Oil–Treasury yield correlation reportedly hits its highest level since at least 1985

A market commentary posted September 18, 2026, says the 100-day correlation between oil prices and the 10-year U.S. Treasury yield reached about 0.65—its highest level since at least 1985. The post says that measure more than tripled over the preceding several weeks. It also puts the correlation between the 10-year Treasury yield and the S&P 500 near its lowest level this century, describing rising yields as increasingly weighing on stocks.