U.S. Treasury Yields Surge to 4.85% Amid Iran Tensions, Triggering Bond Selloff and Mortgage Rate Pressure

The 10-year U.S. Treasury yield surged past 4.80% on March 2, 2026, peaking at 4.85% amid escalating tensions between Iran and Western-aligned nations. This sharp move marks the largest bond selloff since June 2025, as investors reassess inflation and risk premiums in response to regional instability. The yield jump has directly impacted mortgage-backed securities, with 30-year fixed mortgage rates rising to 7.32%, the highest since late 2023, according to national data sources. The spike in Treasury yields reflects a flight to safety in fixed income markets, with investors abandoning long-duration bonds in anticipation of higher interest rates and potential supply shocks. The move has disproportionately affected real estate and financial sectors, where higher borrowing costs are compressing margins and slowing transaction volumes. Financials, including large banking institutions and insurance firms, are seeing increased pressure on bond portfolios with duration exposure. Energy markets reacted in tandem, with crude oil futures (CL=F) rising 4.2% to $89.60 per barrel as supply concerns mounted. The defense sector also saw upward momentum, with major contractors like Lockheed Martin and Raytheon experiencing gains of 3.1% and 2.7%, respectively, as investors priced in potential military escalation. Meanwhile, the CBOE Volatility Index (^VIX) climbed to 28.4, signaling heightened market uncertainty and a shift toward defensive positioning. The Federal Reserve has not signaled immediate rate hikes, but the selloff underscores a broader shift in market expectations. With Treasury issuance set to increase in the coming months, the combination of geopolitical risk and fiscal pressure could sustain elevated yields, affecting everything from corporate bond spreads to consumer credit costs.