On December 23, the price index of metal silicon and organic silicon DMC was 80.83, a decrease of 0.05 points from yesterday, and a decrease of 25.14% from the highest point of the cycle at 107.97 points (2015-02-10), the lowest compared to April 18, 2017 The point 64.62 rose 25.09%. (Note: Period refers to 2012-01-01 to present)