Calculation problems of futures industry

1, this question is not rigorous. If the selling price of 15500 is higher than the buying price of 155 10, the transaction will be made at the price of 15500, otherwise the transaction will be made at the price of 155 10.

2. If the selling price 1550 and the buying price 155 10 are hanged at the same time, the transaction will be made at the price closest to the previous transaction price according to the trading rules of Shanghai Futures Exchange, that is, at the price of 15500, so c 。

3. The transaction will not be made at the price of 15505, because the minimum change price of Shanghai Copper is 10 yuan, and 15505 is not a reasonable transaction price.

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