External Shocks and the Law of Carbon Price Fluctuation—Based on the Framework of CWT and EEMD

Abstract

This paper focused on researching the fluctuation of carbon trading price caused by the external shocks through analyzing the data of three-phase carbon spot price from Blue Next Environmental Exchange and the European Climate Exchange (ECX). The results are the following: 1) released important information and events will seriously affect the carbon price fluctuations; some important information are released that cause sharp fluctuations in a short period of time; the Sudden events lead to long-term, drastic fluctuations in carbon price and its influence over the impact of important information; 2) the impact of external events is always corresponding to the low-frequency component of time sequence; this is because the low-frequency component usually reflects the data signal amplitude which is severer, and the high-frequency component represents the data signal amplitude which is a smaller part; it has random fluctuations of the time sequence.