This study is an initial attempt at investigating the extent to which portfolio diversification benefits at different investment horizons are available to a Turkish investor from investment in MENA countries exposed to the Arab spring based on MGARCH-DCC and Wavelet techniques on daily data spanning from 2005 to 2015. The findings tend to suggest that the Turkish investors may not benefit from investment in Egypt for almost all investment horizons but may have moderate benefits from Lebanon up to the investment horizons of 32 - 64 days and longer. However, Turkish investors may benefit from Oman excepting the longer investment horizons. In the long run all stock holding periods exceeding 32 days have minimal benefits for portfolio diversification.

Sukuk is a highly appealing alternative instrument of conventional bond in the financial market over the last two decades. To a certain extent, the market players assume sukuk as the same as bond. However, sukuk has its own fundamental asset backed principles, whereas bond is backed by debt. The objective of the study is to examine the Granger-causality and lead-lag relationship between sukuk and bond by using the data of the Malaysian Government securities return for both conventional and Islamic instruments. The data for every working day of 7 years covering the period from January 31, 2007 to December 31, 2013 were collected from Bloomberg database. The yield returns of both securities have been plotted for each six months of a year. This study applied both Granger-causality and dynamic co-movement techniques such as, continuous wavelet transforms (CWT) coherence for analyzing the temporal evolution of the frequency content of both securities by decomposing each period into different time scales. The empirical findings of the paper reveal that with a bit of exception, there is a causal relationship between sukuk securities and conventional bonds for a given period of time. For robustness, this study applied the wavelet coherence approach and found that bond is led by sukuk in the long term investment horizon rather than in the short term. Our findings relating to the lead-lag relationship between sukuk and bonds have important implications in terms of policy regulations and investment management. Future research and market practices could reinvestigate the differences between these two securities across different markets and types