Government bond yields across the US, UK, Europe, and Japan surged to multi-year highs in mid-May 2026, driven by investor concerns over war-driven commodity inflation, persistent fiscal deficits, and diminished central bank credibility on rate cuts. The sell-off reflects a broad repricing of sovereign duration risk rather than a single idiosyncratic event, with 30-year yields in multiple markets hitting levels not seen since the early 2010s.
Armada's traditional repo desk holds Treasury and agency collateral that loses mark-to-market value as yields rise, requiring margin top-ups from counterparties and potentially triggering collateral substitution requests. Rising borrowing costs also stress hedge fund and asset manager counterparties leveraged in duration. Haircut schedules for longer-dated Treasuries should be reviewed against current yield volatility levels.