Block trade

A block trade is a privately negotiated, large-volume transaction in futures, swaps, or options that occurs off-screen but is reported to the relevant exchange or platform. In oil and product markets, block trades are widely used by producers, refiners, trading houses, and financial institutions to hedge substantial exposures or restructure portfolios without broadcasting their full size to the market. Because standard order books may not support big trades without moving price sharply, the block mechanism allows counterparties to agree a price that reflects size and market conditions while limiting visible impact. Block trades can involve single legs or complex structures such as crack spreads, time-spread packages, or option combinations tied to refining margins or storage plays. Once executed, they are reported under strict rules that protect transparency while still giving participants execution flexibility. For traders, block trades are a key tool for managing large risk transfers efficiently, minimising slippage, and coordinating hedges with physical deals and internal risk limits.