Credit Impulse
The Credit Impulse is a macroeconomic indicator that measures the change in the flow of new credit extended by the private sector as a percentage of GDP, historically used to assess how the rate of acceleration or deceleration in credit creation has corresponded with swings in economic activity and asset price cycles.
Credit Impulse was developed and popularized by economist Michael Biggs, who argued that it is not the level of credit in an economy, nor even the rate of growth of outstanding credit, but rather the change in the rate of credit growth — the second derivative of credit — that most closely corresponds with changes in economic activity and demand. This insight builds on the simple observation that GDP growth is influenced primarily by changes in spending, and changes in spending depend not on how much debt already exists but on how much new net lending is currently flowing into the economy.
The formula is straightforward: Credit Impulse equals the change in new credit flows (the increase or decrease in the net flow of new lending) divided by GDP. When this ratio is rising — when credit is accelerating — it historically has been associated with strengthening economic momentum. When it is falling — when credit is decelerating even if still growing — it historically has corresponded with softening economic conditions. A sharply negative Credit Impulse, where net new credit is actively shrinking, has historically corresponded with recessions and periods of significant economic contraction.
China's Credit Impulse has received substantial attention in global macro analysis because of the scale and speed with which Chinese policymakers have historically deployed credit stimulus. When China's credit impulse surged following its 2015-2016 growth scare or its COVID-era stimulus response, global analysts tracked the signal as a leading indicator for commodity demand, industrial production trends, and emerging market economic cycles that followed with a typical lag of several months.
For the United States, Credit Impulse analysis draws on Federal Reserve Flow of Funds data and bank lending surveys, including the Senior Loan Officer Opinion Survey on Bank Lending Practices (SLOOS), which the Fed publishes quarterly. Periods of tightening bank lending standards and slowing credit creation — as observed in the wake of the 2022-2023 Federal Reserve rate hiking cycle — have historically been associated with decelerating economic activity in the quarters that followed.
The Credit Impulse concept reflects a broader principle in macroeconomics: that the economy is sensitive to the rate of change in its financial conditions, not just their absolute level. A highly indebted economy that is still growing its debt load is in a different position than one where debt growth is turning negative, even if the absolute debt level in both cases is identical. This dynamic helps explain why credit cycles — the boom-and-bust patterns of credit expansion followed by contraction — have historically played such a central role in U.S. and global economic cycles.