The US30Y yield has only gone in one direction for the last 30+ years, down.
Using the TradingView monthly price history, the US30Y yield peaked in Oct 1987 at 10.234%.
Every successive period has seen lower highs on the US30Y yield. The most recent peak in Oct 2018 was at 3.466%.
Using Fibonacci analysis, the successively lower highs from the Oct'87 peak have...