Pacific Investment Management Co.'s chief investment officer Daniel Ivascyn warned that credit markets face mounting stress despite record-tight spreads. His assessment comes from an emailed circular where he noted significant developments occurring below the surface of apparent market calm.

Ivascyn stated the first sustained default cycle in credit in years has already begun, signaling that investors should prepare for losses exceeding recent historical norms. While credit spreads suggest confidence, hidden pressures are building across the sector.

The warning carries weight given Pimco's $2.2 trillion asset management footprint and Ivascyn's role steering investment strategy. Private credit markets have expanded dramatically since 2020, with issuance reaching unprecedented levels during low-rate periods.

Higher credit losses could pressure yields across fixed-income sectors and force repricing of risk assets. Investors counting on continued benign credit conditions may need to reassess positioning as defaults accelerate beyond the pandemic-era disruption period.