Last kilometer, also often called Last Mile in Britain and the United States, originally meant to complete the last mile of a long journey, and was extended to mean completing a This is the last and critical step (usually it also means that this step is full of difficulties). As physical enterprises further deepen their inventory management and price risk management, basis pricing is widely used in commodities, and basis arbitrage trading is also In the business of spot subsidiaries of futures companies, the market's demand for basis risk management tools and basis arbitrage trading tools is becoming more and more urgent, and risk management trading tools based on basis differences are urgently needed.

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