Crack

A crack spread represents the price difference between a crude oil benchmark and the refined products derived from it, typically expressed using futures or forward prices. Although rooted in the energy sector, the concept is broadly useful in understanding how processing margins work in any market where a raw input is transformed into multiple outputs. In the case of refining, traders monitor crack spreads to assess profitability, evaluate hedging needs, and understand whether margins favour producing gasoline, diesel, or other products. The spread can be structured in many ways—for example, a 3-2-1 crack represents the theoretical margin of refining three barrels of crude into two barrels of gasoline and one of diesel. Fluctuations in crack spreads can arise from seasonal demand patterns, shifts in consumption, refinery outages, and macroeconomic trends. Market participants may trade crack spreads to hedge operational risks, speculate on changing margins, or arbitrage pricing differences between related instruments. Although cracks are most commonly associated with the oil industry, the notion of processing spreads appears in other markets too, such as crush spreads in soybeans or spark spreads in power generation. These metrics provide insight into the economics of converting raw inputs into end products.