Credit Impulse

What Is the Credit Impulse?

The credit impulse is defined as the second derivative of private credit — specifically, the change in new credit flows as a percentage of GDP. Developed and popularized by economist Michael Biggs, the concept reframes how analysts think about credit's role in the economy. Rather than asking 'how much credit exists?' (the stock) or even 'is credit growing?' (the first derivative), the credit impulse asks: is credit growth accelerating or decelerating? It is this acceleration or deceleration that correlates most powerfully with changes in demand, output, and asset prices.

The intuition is straightforward: an economy doesn't just need credit to exist — it needs an increasing flow of new credit to sustain demand growth. A borrower who took out a mortgage last year is not creating new spending power today. New loans create new purchasing power; their absence, even if total debt levels remain high, acts as a drag. This means the credit impulse can turn negative while credit levels are still growing — a subtlety that many standard economic analyses miss.

Why It Matters for Traders

The credit impulse is one of the most reliable leading indicators in macro trading, typically leading GDP growth by roughly 9–12 months and equity market earnings by a similar horizon. When the credit impulse turns sharply positive — as when China deployed massive credit stimulus in 2015–2016 or post-COVID in 2020 — traders can anticipate a reflationary impulse in commodities, EM equities, and cyclical sectors well before it appears in hard economic data.

Conversely, a deteriorating credit impulse warns of slowing growth even when headline indicators appear healthy. This is particularly useful for sector rotation decisions: a fading credit impulse favors defensive positioning (utilities, staples, short-duration fixed income) over cyclicals and financials. For credit traders specifically, a weakening impulse is an early warning for widening HY spreads and rising default risk.

How to Read and Interpret It

Practical interpretation guidelines:

• Credit impulse above +2% of GDP: Strongly reflationary — favorable for risk assets, commodities, and cyclicals.
• Credit impulse near zero: Neutral — growth is being sustained but not accelerated by credit creation.
• Credit impulse below -2% of GDP: Contractionary signal — historically associated with slowing growth, equity multiple compression, and widening credit spreads.
• Rate of change matters more than level: A credit impulse that moves from -3% to -1% is still negative but represents an improving trend, often sufficient to stabilize risk assets.
• China's credit impulse deserves special attention: given the outsized role of Chinese bank credit in global demand, China's impulse is tracked as a leading indicator for global industrial activity and commodity prices, particularly copper and iron ore.

Historical Context

The predictive power of the credit impulse was starkly demonstrated during the European debt crisis. As Eurozone bank deleveraging accelerated between 2011 and 2013, the European credit impulse collapsed to roughly -4% to -5% of GDP. This preceded a double-dip recession across the Eurozone, with GDP contracting roughly 0.9% in 2012–2013, even as ECB policy rates remained accommodative. The credit impulse gave traders a 9–12 month advance warning to reduce European cyclical exposure and position for ECB intervention — which finally came with Draghi's 'whatever it takes' speech in July 2012.

More recently, China's credit impulse surging in Q4 2022 through early 2023 (reaching approximately +3% of GDP) was one of the key signals behind the commodity and EM equity rally of early 2023, even as Western economies remained on the edge of recession.

Limitations and Caveats

The credit impulse is a model-dependent construct requiring consistent data on new credit flows, which varies in quality and timeliness across economies. In the U.S., shadow banking, securitization, and non-bank lending can distort traditional bank credit measures. The indicator also has a long lead time, making it frustrating for shorter-term traders. Finally, fiscal impulses can offset or override credit impulses — heavy government spending can sustain demand even when private credit is contracting, as demonstrated during the 2020–2021 period.

What to Watch

• China total social financing (TSF) data (monthly PBOC releases)
• U.S. Federal Reserve H.8 data (commercial bank lending)
• ECB bank lending surveys (quarterly)
• Bank credit officer surveys for tightening/loosening standards
• M2 money supply growth rate as a cross-check