Bonds Slip on Iran Tensions: Volatile Week for Rates Ahead
April 28, 2026
Mortgage markets opened lower this Tuesday, April 28, 2026, pressured by escalating tensions in Iran that sent oil prices climbing and stoked fresh inflation worries. Mortgage-backed securities (MBS) saw notable declines, reflecting broader bond market weakness. With a high-stakes week ahead, including key Fed decisions, GDP reports, inflation data, and Treasury auctions, volatility is expected to dominate.
Fresh headlines from the Middle East triggered the bond sell-off, pushing yields higher and MBS prices down by 14 basis points. This geopolitical flare-up has amplified concerns over persistent inflation, countering recent hopes for rate relief. Market participants are bracing for turbulence this week, headlined by Federal Reserve policy announcements and critical economic indicators like GDP and inflation figures. Treasury auctions will add further pressure points. Float/lock guidance leans toward locking positions of 7 to 30 days, while advising floats for 30+ days amid the uncertainty.