On December 18th, the Pentane Commodity Index stood at 85.68, remaining unchanged from yesterday and marking a new historical low within the cycle, dropping by 72.54% compared to its peak of 311.97 points on October 27, 2021. (Note: The cycle refers to September 1, 2020, to present.) According to data monitoring by Business Sheets, the price index curve for Pentane is as follows: Date | 09-19 | 09-28 | 10-07 | 10-16 | 10-25 | 11-03 | 11-12 | 11-21 | 11-30 | 12-09 | 12-18 | Commodity Index | 92.73 | 9.88 | 9.45 | 9.45 | 9.45 | 9.53 | 9.81 | 9.81 | 9.38 | 86.75 | 85.68