2020-7-27 · Copper-gold ratio stability guides the path for future interest rates. April 28, 2020. Special Note: This is an update of a previous Kitco News column, Gundlach indicator: stable copper-gold means low yield volatility, November 11, 2019 Jeffrey Gundlach, CEO of DoubleLine Capital LP (DoubleLine®), noted in his 2017 forecast that the copper-to-gold ratio was a "fantastic" indicator of interest ...