Supply Shocks Keep Landing and Monetary Policy Only Reaches Demand

The Bloomberg Softs index has climbed more than 35% off its low, putting it within reach of last year's high and pulling attention back to a question central banks cannot answer with interest rates alone. Monetary policy cannot resolve supply-driven inflation because it acts on demand, while the pressure originates in the cost of producing and moving physical goods. Energy sits inside every stage of the agricultural supply chain, from fertilizer and machinery through to transport, processing, refrigeration and distribution, and since 2020 movements in energy and agricultural prices have become closely linked. That linkage has also become more durable, with the relationship to realized inflation strengthening rather than fading as the lag lengthens.

David Scutt is a Senior Market Analyst for Global Macro at StoneX Media, with more than a decade spent as a foreign exchange spot, forwards and money markets dealer in bank treasury, where he managed interest rate and liquidity risk. He produces technical and fundamental analysis across foreign exchange, commodities and equity indices, covering the same intersection of commodity costs, inflation data and rate expectations that this shift runs through.

Key Themes

• Energy costs run through fertilizer, machinery, transport, processing, refrigeration and distribution across the agricultural supply chain.
• Commodity price movements now track realized inflation more closely and for longer than they did before 2020.
• Monetary policy influences demand, so supply-driven cost pressure sits outside its direct reach.

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Overlapping Supply Shocks Stop Inflation Returning to Baseline

The post-pandemic period has delivered a run of major supply disruptions rather than a single isolated event, and that sequencing is what separates a price spike from a regime. The pandemic and the supply chain disruption that followed it, Russia's invasion of Ukraine, and a further energy shock in the Middle East have arrived in succession. "Rather than being isolated events, it feels like one supply shock is arriving before the inflationary effects of the last have fully dissipated", Scutt says. The economy never fully clears one round of cost pressure before absorbing the next, which is why commodity moves now correlate with realized inflation across longer horizons than they did before 2020. For anyone positioning around the inflation path, that changes the working assumption from a temporary distortion to a persistent input.

Monetary Policy Reaches Demand While Supply Sets the Cost Base

"Monetary policy can't produce more oil, food or other scarce resources directly", Scutt points out, framing the constraint that defines the current cycle. What policy can influence is demand, which means the response to a supply shock is necessarily indirect and works by cooling activity rather than easing the bottleneck itself. Where demand stays firm and fresh disruptions keep landing, the risk is that price pressure becomes more entrenched, "spreading through wages, services prices and the broader economy". In contrast to the pre-pandemic era, when energy moves showed almost no relationship with core inflation three quarters later, the transmission channel is now visible in the data. That leaves policy carrying weight it was never designed to carry, with implications for how long restrictive settings stay in place.

 

--- Written by Frédéric Guétin, StoneX Media Producer

--- Expert: David Scutt, StoneX Media Senior Market Analyst