Nurfadhlina Abdul HalimNurharyanti Borhan2024-05-282024-05-2820222022-6-172672-72262353-1510.46754/jssm.2022.05.010https://oarep.usim.edu.my/handle/123456789/5586Journal of Sustainability Science and Management Volume 17 Number 5, May 2022: 133-138Rational speculative bubbles are a factor that has often led to the collapse of the economy. In this study, the size of rational speculative bubble from the first cycle to the fifth cycle are identified by using a generalised Johansen-Ledoit-Sornette Model. This study also discussed the effects of the burst of the rational speculative bubble also known as the financial bubble. Then, the economic performance of the countries that pioneered the world economy will be analysed along with the stock prices, the performance of Gross Domestic Product (GDP) and the timeline of the global pandemic. Lastly, this paper discussed the effects of the existence of financial bubble and the presence of pandemics towards the sustainability of the living standards for the B40 and M40 household groups in Malaysia.enRational speculative bubble, stock market price, B40, M40.Article133138175