SMM

 SMM, March 19th: During the trading session on March 19th, the opening price of the main contract for Shanghai nickel was 139,600 yuan/ton, and the closing price was 137,460 yuan/ton, a decrease of 2,490 yuan/ton from the previous trading day's closing price. Intraday trading weakened compared to the previous trading day, with a decrease of 15,008 lots in trading volume and a decrease of 859 lots in open interest...