US short-term credit market shows early signs of stress as Iran war persists

• A2/P2 commercial paper spreads over SOFR widened sharply to 44 basis points from 17 bps before the conflict began on February 28, indicating higher borrowing costs for lower-rated corporate issuers
• Prime money market fund assets fell 2% to $1.246 trillion in the week ending April 1, suggesting funds are allowing commercial paper to mature rather than rolling it over amid uncertainty
• Bank floating rate note spreads widened by 13 basis points to 33 bps in March, signaling tightening credit conditions for major U.S. banks' unsecured term funding

Summary

Market Stress Emerges as Iran Conflict Escalates

The prolonged U.S.-Israeli conflict with Iran is triggering early signs of stress in U.S. short-term credit markets, raising liquidity concerns as tensions approach a critical deadline set by President Trump.

Key Market Segments Affected:

The $1.5 trillion commercial paper (CP) market—a crucial corporate funding source—shows widening spreads indicating deteriorating credit conditions. AA-rated non-financial CP spreads over one-month SOFR increased to 6 basis points from zero pre-conflict (Feb 28). Lower-rated A2/P2 issuers face sharper pressure, with spreads jumping to 44 bps from 17 bps before the war.

The spread between A2/P2 and higher-rated A1/P1 credit widened to 38 bps from 20 bps, signaling a "mild risk-off environment." This remains well below the 200-300 bps seen during the March 2020 COVID-19 crisis, but indicates rising caution among investors.

The $2 trillion bank floating rate note (FRN) market also shows strain, with six-month spreads over SOFR widening 13 bps to 33 bps in March—a signal of tightening credit conditions for major U.S. banks.

Investor Behavior:

Prime money market funds, major CP buyers, saw assets decline 2% to $1.246 trillion in the week ending April 1. Analysts suggest funds are allowing holdings to mature rather than rolling them over, potentially using proceeds for redemptions.

Market Implications:

Rising funding costs across the credit curve reflect broad risk aversion. Lower-tier credits are cracking first, consistent with historical crisis patterns. Investors await clarity before re-entering markets, with uncertainty about near-term liquidity conditions driving caution among money market participants and corporate borrowers facing higher financing costs.