點心債券和中國公司債券信用價差的影響因素

本文主要探討影響中國離岸市場發行的點心債券以及中國境內市場發行的中國公司債之信用價差的影響因素，採用的樣本是2011年至2012年間無信評與有信評的點心債券，共有216檔，以及經過中誠信國際信用評級有限責任公司或是聯合資信評估有限公司評級的中國國內公司債。實證結果顯示，點心債券的信用價差顯著的受到兩個解釋變數的影響，一個是人民幣升值預期，另一個則是點心債券是否有信用評等；中國國內公司債的信用價差則受到債券的期間、發行規模、信用評等與發行公司產業類型的影響；本文也發現點心債券的到期殖利率顯著低於中國公司債，更進一步分析後發現，點心債券的信用利差和其發行規模呈正向關係，和中國境內債券市場相較，點心債券市場規模仍偏小，深度較淺，故大規模的發行會導致信用利差上升。

關鍵字

點心債券；信用價差；人民幣計價債券；離岸人民幣債券市場

並列摘要

The purpose of this study is to examine the determinants of credit spread between the Chinese offshore bond markets and the Chinese domestic bond market by using a sample of 216 dim sum bonds including rated and non-rated bonds in the Chinese offshore bond markets and a sample of 1105 bonds rated by either China Chengxin Credit Management Co., Ltd. or China Lianhe Credit Rating Co., Ltd. in the Chinese domestic bond market.The empirical results show that the credit spread of dim sum bonds is significantly affected by RMB appreciation expectation and whether dim sum bonds are rated or not. The credit spread of Chinese corporate bonds is influenced by the term-to-maturity of the bond, issue size, credit rating and the industry of the issuing corporation. We also find that the credit spread of dim sum bonds is significantly lower than that of Chinese corporate bonds. Further analysis reveals that the credit spread of dim sum bonds is positively related to their issue size due to shallowness and small in size of the Chinese offshore RMB-denominated bond market when compared to the Chinese onshore bond market.