Test on yields of equivalently-rated bonds

Mohamed Ariff (Department of Economics and Finance, Sunway University, Bandar Sunway, Malaysia)
Alireza Zarei (Department of Economics and Finance, Sunway University, Bandar Sunway, Malaysia)
Ishaq Bhatti (La Trobe University, Melbourne, Australia)

International Journal of Islamic and Middle Eastern Finance and Management

ISSN: 1753-8394

Publication date: 16 April 2018



This paper aims to report practice-relevant anomalous investment yield behavior of two types of bonds – Type A, the mainstream bond, and Type B, which is Sukuk – both having similar cash-flow-relevant characteristics.


Bond valuation theory suggests that yields to investors of similarly rated bonds ought to be same. The authors collected time-series data on A and B bonds, all being coupon-paying bonds with similar rating and similar tenor as two matched samples traded in a bond exchange. To ensure the results are extended to different bond sectors, the data set was separated into treasury bonds as risk-free and corporate bonds as risky ones. The data set was further sub-divided into short-, medium- and long-tenor bonds. As the data straddle the Global Financial Crisis period, the authors use appropriate econometric method to control the possible effect from the crisis.


The average and median yields on Type A bond are significantly different from those of Type B. The test results show significant and systematic differences: treasury bonds of Type A returns yield lower than treasury bonds of Type B; the yields of corporate mainstream bonds (A) are higher than the yields of Sukuk (B). The authors observe these findings constitute a puzzle, being anomalous to theory.


This paper is original in that it is documenting significant differences in pricing of equivalent bonds. This has both theory and practice implications for fixed-income security market practices. The evidence is very strong to suggest that the identical types of bonds may have missing variable that contributes to the difference. Therefore, further research to identify the missing variable is necessary.



Ariff, M., Zarei, A. and Bhatti, I. (2018), "Test on yields of equivalently-rated bonds", International Journal of Islamic and Middle Eastern Finance and Management, Vol. 11 No. 1, pp. 59-78. https://doi.org/10.1108/IMEFM-02-2017-0040

Download as .RIS



Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

Please note you might not have access to this content

You may be able to access this content by login via Shibboleth, Open Athens or with your Emerald account.
If you would like to contact us about accessing this content, click the button and fill out the form.
To rent this content from Deepdyve, please click the button.