| Natural gas represents new energy,whose price has an influence on the stability of energy market.So it is of great practical significance to realize the fluctuant features of natural gas price.This paper mainly explores and analyzes evolution law of natural gas future price and spot price based on complex network.This paper is mainly divided into two parts.The part one translates fluctuation series of natural gas future price and spot price into symbol sequences based on the data of NYHR natural gas future price and spot price by the way of coarse gaining method.We establish fluctuation network of natural gas future price and spot price,whose nodes consist of modes with 5 days and whose edges consist of transition between modes.The other is concentrated on exploring the fluctuation law of natural gas future price and spot price.We analyze the topological properties of the fluctuation network of natural gas future price and spot price including strength and strength distribution,clustering coefficient,betweenness,diameter and average path length in different periods.We find that the core of fluctuation is reflected in the nodes whose strength are around medium value.Secondly,natural gas future price network obeys power-law distribution both on the whole and in different periods,however,the situation of power-law distribution of natural gas spot price network shows more complicated than that of natural future price.Thirdly,the clustering of natural gas future price and spot price network maybe occur in the group with high strength.We also find the betweenness of nodes have something to do with node strength and division.And there exists short-range correlation in the network of natural gas future price and spot price.Lastly,we analyze comovement relation between natural gas future price and spot price contrastively. |
PDF Full Text Request