What Happens to S&P 500 ETF (SPY) When the Copper-Gold Ratio Collapses?
Copper-gold ratio collapse signals growth concerns and is often called "Dr. Copper's recession warning". What happens when the industrial-to-monetary metals ratio crashes?
How S&P 500 ETF (SPY) Responds
Scenario Background
The copper-gold ratio measures pounds of copper per one ounce of gold. Copper is the industrial-growth proxy ("Dr. Copper" for its economic PhD). Gold is the monetary and safe-haven metal. Their ratio captures the balance between growth and fear in global macro.
Read full scenario analysis →Historical Context
The copper-gold ratio hit cycle lows in early 2016 (coincident with Chinese stimulus concerns), December 2018 (Fed pause), March 2020 (COVID crash), October 2022 (hard-landing fears), and mid-2024 (growth concerns alongside AI optimism). Each low was followed by ratio expansion as either growth recovered or monetary easing supported both metals but copper benefited more from industrial demand recovery. The 2020 ratio bottom at 0.15 was followed by a move to 0.28 (87% gain) by 2022. The 1998 rati...
What to Watch For
- •10Y yield divergence from copper-gold ratio (either direction)
- •Chinese manufacturing PMI below 49
- •Copper inventories on LME rising sharply
- •Fed pivot to cuts (often coincides with ratio bottom)
- •Global PMI composite below 48 confirming industrial weakness
Other Assets When the Copper-Gold Ratio Collapses
Other Scenarios Affecting S&P 500 ETF (SPY)
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