This paper uses the methods of SADF and GSADF to test and measure the foam of China's thermal coal price. It is found that there were four significant foam in China's thermal coal price from January 2014 to February 2022. The main reasons are that the coal market is poor in recent years, the downstream demand is greatly reduced, the overcapacity, the rapid development of new energy and the macro policy changes. In view of the above reasons, from the perspective of the government, we should establish an early warning mechanism, implement steady regulation and control, and strictly control the port inventory in order to ensure the good development of the coal price market. 

Ting Liu, Yashi Liu. Coal price foam measurement based on SADF and GSADF. Academic Journal of Business & Management (2022) Vol. 4, Issue 16: 103-108. https://doi.org/10.25236/AJBM.2022.041618.

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