LIBOR-OIS Spread (historical)

What Was the LIBOR-OIS Spread?

The LIBOR-OIS spread was the difference between the London Interbank Offered Rate (LIBOR) and the Overnight Indexed Swap (OIS) rate for equivalent tenor. It captured the credit and liquidity premium for unsecured bank borrowing over the risk-free overnight rate.

LIBOR-OIS was the canonical bank-funding-stress indicator from the 1990s through 2023. It was watched by central bankers, bank treasury desks, macro traders, and credit investors as the cleanest real-time read on interbank market health.

The metric ceased to exist in June 2023 when LIBOR for major USD tenors stopped being published. The FRA-OIS spread (which uses SOFR-based FRAs in place of LIBOR) is the modern successor metric. Conceptually they are equivalent; the difference is the underlying reference rate.

Why It Mattered

LIBOR-OIS was one of the most reliable single indicators of bank funding stress. When banks pulled back from lending to each other, LIBOR rose faster than OIS, and the spread widened. The metric was a leading indicator of broader financial stress and central bank intervention.

The 2008 GFC made LIBOR-OIS famous outside specialist circles. The spread blew out from 8 bp to 364 bp in the months around the Lehman collapse, signaling complete interbank market dysfunction. The Fed's emergency liquidity facilities (TAF, AMLF, PDCF, TSLF) were calibrated against LIBOR-OIS readings.

Historical Episodes

1997-2007: Average LIBOR-OIS around 10 bp. Stable, low-stress regime.

August 2007: First widening to ~80 bp as the BNP Paribas fund freeze foreshadowed credit problems.

March 2008 (Bear Stearns): LIBOR-OIS at ~80 bp.

September-October 2008 (Lehman): Spike to 364 bp on October 10, 2008. The peak coincided with the Reserve Primary Fund "breaking the buck" and the implementation of TARP. Spread declined gradually as Fed liquidity facilities took effect.

2010-2011 (European debt crisis): 25-50 bp range, capturing European bank stress.

2012-2018: Normal 5-20 bp range.

March 2020 (COVID): Brief spike to ~80 bp before Fed liquidity restored normalization.

2023 (SVB / Credit Suisse): The LIBOR transition was nearly complete; this episode was the last using LIBOR-OIS, with the spread reaching ~40 bp before resolution.

Legacy and Modern Equivalents

For pre-2023 historical analysis, LIBOR-OIS is the canonical metric. The thresholds derived from decades of observation (10-15 bp normal, 30-50 bp moderate stress, 100+ bp acute stress, 200+ bp crisis) provide the framework for interpreting bank funding stress.

Modern analysis uses FRA-OIS as the direct successor. The economic mechanism is identical; only the underlying reference rate has changed from LIBOR to SOFR. The accumulated LIBOR-OIS history provides the most extensive empirical base for understanding bank funding dynamics, even though the metric itself is no longer produced.