Monetary Transmission During Financial Crises

In crisis episodes, monetary transmission changes nature as channels break down and unconventional measures take over.

During financial crises, monetary transmission channels distort or break down. Central banks then deploy unconventional instruments to restore liquidity. This shift profoundly alters the effectiveness and reach of policy decisions. Comparing crisis phases to normal periods often leads to misreadings. Examining these breakdowns clarifies the structural limits of transmission.

When transmission channels seize up

In normal conditions, a policy rate cut diffuses to bank lending rates, credit conditions and asset prices through a relatively predictable sequence. In a crisis, this mechanism jams. The freezing of the interbank market during the 2008 crisis, the fragmentation of euro-area sovereign markets between 2010 and 2012, and the credit paralysis during the 2020 lockdowns all illustrate these breakdowns.

The central blocking mechanism lies in risk aversion. When banks doubt the solvency of their counterparties, they stop lending to one another regardless of the policy rate. The credit channel closes independently of refinancing costs. According to the ECB (Financial Stability Review, November 2025), the spread between the unsecured interbank rate and the ECB deposit rate reached 180 basis points at the peak of the 2008 crisis, against less than 10 basis points in normal regimes — a one-to-eighteen ratio that captures the magnitude of the rupture.

New instruments to bypass the blockages

The expansion of the central bank toolkit in crisis periods has profoundly reshaped the nature of monetary transmission. Quantitative easing (QE), targeted longer-term refinancing operations (TLTROs), asset purchase programs and emergency facilities constitute alternative transmission channels that bypass the conventional banking system.

These instruments operate through different routes. QE compresses term premia on sovereign and corporate bonds, directly lowering long-term financing costs. TLTROs condition cheap bank refinancing on actual credit issuance, aiming to unlock the bank channel through incentive rather than price. This transmission logic is mapped in the detailed mechanics of transmission to the real economy. Private asset purchase programs (CSPP, PEPP) directly target corporate financing conditions on capital markets.

Between 2015 and 2022, the ECB balance sheet expanded from approximately €2 trillion to more than €8.8 trillion (ECB data), an unprecedented expansion that reflects the scale of substitution between conventional and unconventional instruments. The massive liquidity injection into the financial system restored market functioning, but through a transmission logic radically different from the classical rate channel.

Persistent limits despite the interventions

Even with these instruments, transmission remains partial in crisis conditions. The fundamental asymmetry of monetary effects intensifies during these phases: confidence and credit are easier to destroy than to rebuild. The liquidity trap concept — where agents prefer to hold cash rather than lend or invest, regardless of the rate level — retains its analytical relevance.

Japan’s post-1990 experience constitutes the most documented case study. Despite rates near zero for more than two decades and massive purchase programs, the Bank of Japan failed to durably revive inflation or trend growth. This precedent illustrates the structural limits of the monetary instrument when private balance sheets remain damaged and deflationary expectations take root.

A crisis modifies not only the tools of monetary policy but the very nature of what it can achieve. The usual lags of monetary transmission lengthen considerably under financial stress, because damaged channels must first be restored before they can transmit impulses. Real-time tracking of cyclical indicators helps identify the first signs of normalization — or persistence — of transmission dysfunctions.

Last updated — 22 May 2026