Crack

Diesel crack spreads just hit ~$102/barrel — up nearly 177% since December. What is a “crack spread” and why is it relevant? It’s the profit margin refiners earn turning crude oil into usable fuel, in this case, the difference between the price of heating oil/diesel and the price of the crude used to make it. Think of crude as flour and diesel as bread. The crack spread is the baker’s margin.When that margin explodes, it usually means one of two things: Either refining capacity is tight (fewer refineries, unplanned outages, maintenance season) or demand for diesel is outrunning supply (trucking, shipping, agriculture, heating). Why should anyone outside energy markets care? Diesel is the backbone of the physical economy. It moves freight, runs farm equipment, and powers construction. When diesel gets more expensive to produce, even if crude oil itself is flat, that cost flows straight into trucking rates, food prices, and shipping costs. It’s a leading indicator for goods-side inflation that shows up in CPI a few months later. And that’s what’s the bond market might be seeing now, particularly in the long end of the curve. The 30-year Treasury yield is essentially the market’s long-run bet on growth and inflation. A sustained spike in crack spreads signals sticky, structural cost pressure in the real economy, not just a transitory commodity blip. If bond investors read this as durable inflation risk rather than noise, they demand higher term premium to hold 30-year debt, pushing yields up and prices down. That, in turn, ripples into mortgage rates, corporate borrowing costs, and equity valuations. So a chart that looks like a niche refining metric is actually one of the more honest, fast-moving signals for where inflation pressure is building, well before it shows up in the official data. The worst part? There is little the Fed can do to correct it. It’s supply driven, not demand.

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