Duration Regime Stress Index
When rates move fast, everything else follows.
DRSI measures the intensity of duration shocks in US fixed income — capturing the pace and scale of yield curve movements that cause broad repricing across all asset classes.
The Duration Regime Stress Index (DRSI) measures the intensity of rate volatility and duration risk in US fixed income markets. Specifically, it tracks the pace of yield curve movement (not just the level of rates), term premium changes, the MOVE Index (bond market volatility equivalent of VIX), and real yield dynamics. High DRSI readings indicate a regime where duration risk is elevated and interest rate volatility is causing broad repricing across all rate-sensitive assets.
Duration risk matters for equities because interest rates are the discount rate applied to future earnings. When DRSI is elevated — rates moving sharply — the discount rate for growth stocks (whose earnings are weighted toward the future) rises rapidly, compressing valuations. High DRSI environments historically correspond with sharp underperformance of long-duration equities (growth, tech, speculative) relative to short-duration equities (value, energy, financials). Understanding the DRSI regime is essential for equity factor allocation.
The 10-year yield gives you a level; DRSI gives you a regime. Two periods with the same 10-year yield can have very different DRSI readings depending on the pace of change, volatility, and cross-market stress. A gradual rise in yields from 2% to 4% over two years produces a moderate DRSI; the same move in three months produces an extreme DRSI. The regime distinction matters because asset class behavior during slow vs. fast rate cycles is dramatically different.
Elevated DRSI often leads to credit spread widening, particularly in long-duration investment grade bonds. As rate volatility increases, the 'option-adjusted' component of corporate bond risk premiums widens, and investors demand more compensation for uncertainty. High DRSI periods also tend to correlate with increased mortgage market stress (widening MBS spreads) and reduced issuance activity as corporates defer borrowing until rate volatility subsides.
