1, the accumulation of futures means that the inventory of futures warehouses increases, which indicates that there are more deliverable commodities in the market. When there are many deliverable commodities in the market, the supply exceeds the demand, which may lead to the decline of futures prices.

2. The accumulation of futures may lead to changes in investors' expectations of the market. When the warehouse inventory increases, investors may expect the future price to fall, so they may sell their futures contracts in the futures market, which will trigger the market selling pressure and further push the futures price down.

3. The accumulation of futures may have an impact on related industrial chains. For example, the increase of futures inventory of a commodity may affect the production, processing and sales of the commodity, thus having a negative impact on the entire industrial chain.