The Duration Drawdown Is the Signal
The end of the 40-year bond bull market is not defined by one dramatic day. It is defined by what happens after yields stop falling.
When long-term yields spent decades moving lower, duration was rewarded twice: bonds delivered income, and their prices rose as rates fell. Portfolios built on that experience came to treat duration as a quiet source of ballast. That assumption is now being tested.
The useful signal is the duration of the drawdown, not merely its depth. The aggregate bond market peaked at exceptionally low yields, which means carry was thin and interest-rate sensitivity was high. A recovery is difficult when rates merely hold steady because the coupon does not compensate investors for the volatility they are carrying.
This changes the role bonds play in a portfolio. A nominal bond can still diversify an equity shock, but it is no longer automatically a hedge against every form of risk. Inflation, fiscal pressure, and a higher neutral rate can keep the long end elevated even when the economy slows.
Investors should separate a mark-to-market loss from a broken allocation. The question is whether the portfolio needs duration for liability matching, for income, or for a recession hedge. Each purpose calls for a different maturity and sizing decision.
The lesson is not to abandon bonds. It is to stop assuming that the old bond bull market will quietly return on its own timetable.
