Despite recent extreme fluctuations of Middle East and North African (MENA) stock markets, we do not find strong evidence of rational speculative bubbles from the perspective of both domestic and U.S-based investors. Fractional integration tests built on ARFIMA models do not support the...

We extend the rational speculative bubbles literature to the frontier emerging stock markets. For this purpose, this paper employs fractional integration tests and duration dependence tests based on the ARFIMA models and nonparametric smoothed hazard functions. Unlike traditional bubble tests,...