The "term premium," the extra yield investors demand for holding long-term bonds, is breaking out after years of Fed suppression. Its resurgence indicates investors are now demanding compensation for long-term inflation and sovereign risk, posing a major threat to markets reliant on cheap leverage.

The classic risk-off dynamic has inverted. Due to intractable deficits and massive debt issuance, the US Treasury market has transformed from a safe haven into the main source of risk for the stock market. A sell-off in bonds now directly threatens equities.

Contrary to the perception of market turmoil, the recent global bond sell-off has been characterized by low volatility. This orderliness suggests the move is driven by a durable, fundamental repricing of interest rates rather than a temporary, fear-driven market dislocation that would typically involve high volatility.

The common assumption is that reduced Fed forward guidance increases uncertainty, leading to a higher term premium and bond yields. However, this creates volatility in both directions. While yields might rise in an inflationary environment, a lack of guidance could also cause them to fall sharply during a period of negative economic surprises.

When inflation risk dominates markets, the traditional negative correlation between stocks and bonds breaks down. Bonds (duration) stop acting as a reliable hedge for equity drawdowns. In this environment, investors must seek explicit convexity hedges, like call options on oil or inflation breakevens, rather than relying on a balanced portfolio.

If the Fed cuts rates too aggressively during a productivity boom, the bond market will likely sell off long-duration bonds. This "bear steepening" would raise long-term yields that influence mortgages and corporate borrowing, tightening financial conditions and counteracting the Fed's intended easing.

If the GSEs hedge the volatility (convexity) exposure of their new mortgage portfolio, as they have historically, it would increase demand for options in the swaption market. This would pressure implied volatility higher, raising the option cost embedded in mortgages and potentially pushing primary mortgage rates up.

The dominance of leveraged hedge funds as the marginal buyers of long-term bonds means that during a crisis, bonds are sold off alongside equities. This forced de-leveraging negates their traditional safe-haven role, transforming them into a risk asset that falls during market stress.

AI will enable homeowners to refinance faster when rates fall. This rapid prepayment shortens the duration of mortgage-backed securities (MBS), making them "negatively convex." Investors will demand higher yields (wider spreads) to compensate for this increased risk, as the securities they hold will be paid back sooner than historical models predict.