TREE NEWS reports: Bond market veteran Harley Bassman warned that a 20-year Treasury yield above 6% would be a “nightmare scenario,” potentially triggering a deliverable swap with an impact roughly equal to the Treasury auctioning $110 billion of 20-year notes over four months. In his Convexity Maven report, Bassman said CBOT futures deliverable switches may have contributed to the recent rapid rise in rates as traders holding large positions crowd through a narrow liquidity door.
Bassman: 20-Year Treasury Yield at 6% Would Trigger ‘Nightmare Scenario’
Bassman's point is less about the 6% level itself than about market plumbing: when positioning crowds into a narrow liquidity channel, mechanical futures-deliverable switches can amplify rate moves rather than merely reflect them. That matters for anyone hedging duration or financing in the long end, because it suggests recent yield spikes may partly be structure, not just macro. The open question is whether such switches keep driving volatility independently of fundamentals.
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