MBS Yields Hit 6.01% Amid Municipal Bond Rout
Current-coupon MBS yields rose 39 basis points to 6.01% as Treasury rates climbed. Municipal bonds suffered significant price declines due to high supply and reduced retail demand.
Current-coupon mortgage-backed securities yields reached 6.01% at yesterday's close. This level marks the highest point since mid-January 2025. The yield increased by 39 basis points from the previous Thursday.
Treasury yields drove the initial sell-off in the bond market. Fed Chairman Kevin Warsh delivered a hawkish speech at Jackson Hole last Friday. Rising oil prices and a higher-than-expected producer price index report sustained the decline. The market reaction to the Treasury Department's buyback announcement was negative.
Municipal Bonds Face Sharp Decline
Municipal bond performance lagged the mortgage-backed sector significantly this quarter. Debt issuance levels were unexpectedly high for this time of year. Fund flows decreased while retail investors sold assets in response to the broader fixed-income market drop.
Muni yields rose faster than Treasury yields across the curve. The 10 to 20-year maturity range saw the steepest increases. Muni-to-Treasury ratios expanded substantially, indicating relative weakness in the municipal market. Prices for longer-duration municipal bonds fell precipitously over the last two weeks.
Retail Demand Shifts In The Bond Market
Municipal bonds were considered expensive relative to history in the first half of the year. Analysts attributed this to strong retail buying interest. That demand has diminished considerably as the bond market sold off. New supply remains unusually high compared to seasonal norms.
A 16-year Virginia Aa2 rated health bond illustrates the price impact. The bond traded at 99.504 on June 30 with a yield of 4.042%. By July 31, the price had dropped to 95.469 with a yield of 4.401%. The yield continued to rise, reaching 4.699% as prices fell further. This trend aligns with the broader surge in municipal yields observed since late June.
Market Volatility And Spread Dynamics
Spreads between current-coupon MBS and Treasuries moved slightly above their recent tight range. Implied interest-rate volatility increased during the sell-off. As of midday today, MBS yields were a few basis points lower than the previous close. Spreads were also slightly tighter than at the end of the prior trading session.
GN auto markets and bonds data reflects these shifts in fixed-income pricing. The divergence between municipal and mortgage-backed sectors highlights changing investor preferences. High supply continues to pressure municipal prices despite some stabilization in mortgage-backed yields. Market participants are recalibrating positions in response to these yield movements.
