SMM May 15th: On May 15th, the opening price of the main Shanghai nickel contract was 144,460 yuan/ton and the closing price was 144,380 yuan/ton, a decrease of 80 yuan/ton from the closing price of the previous trading day. Intraday trading increased from the previous trading day, with a trading volume of 215865 lots and an open interest of 78,586 lots, an increase of 16,653 lots and a decrease of 1,431 lots from the previous trading day. The combination shows that the long and short sides are more interested in trading, but the bears are unwilling to continue to increase their positions, while the decrease in open interest and the decline in prices show that the bulls are eager to close their positions, and the long stop loss behavior is obvious. Today's Shanghai nickel main contract opened rapidly downward, to the lowest point of the day 142,280 yuan / ton after the pullback, after the afternoon opening to reach the intraday high, and then downward pullback, the final intraday rise and fall of -0.03%.