Abstract: With the further development of economic globalization and the increasing influence of Chinese factor, the price linkage mechanism of domestic and foreign metal futures markets as well as international pricing issues have drawn public's attention. Based on the multi-dimensional information spillovers and by taking the examples of SHFE (Shanghai Futures Exchange), LME (London Metal Exchange) and COMEX (New York Commodity Exchange), Directed Acyclic Graphs and Information Spillover Index model are used to study the dynamic linkage between domestic and foreign copper futures markets from 1994 to 2015,and the current situation and dynamic trend of international pricing power of Chinese copper futures market are also measured. The results show that the return spillovers are much stronger than volatility spillovers,and the dynamic of return and volatility spillovers show significant difference, the return spillovers display a significant increasing trend, while the volatility spillovers are more influenced by extreme events like financial crisis. Furthermore,the international pricing power of SHFE copper market shows the characteristics of stages.It presents a gradually rising trend before October 2003, then falls back, and significantly improves after 2007. But the information spillover strength from international market to SHFE copper market is higher than the foreign overflow of SHFE copper market,which demonstrats that the international pricing power of Chinese copper futures market is still relatively weak.Our findings can not only provide valuable market information for market participants and regulators, but also have important theoretical value and practical significance for correctly understanding the role of Chinese metal futures market in international commodity pricing, while also accelerats the development of Chinese metal futures market.

Key words: information spillover, copper futures market, international pricing power, return spillover, volatility spillover