Interval-valued estimation for the five largest market capitalization stocks in the stock exchange of Thailand by Markov-Switching CAPM

• Main Authors: Karn Thamprasert, Pathairat Pastpipatkul, Woraphon Yamaka
• Format: Book Series
• Published: 2018
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85038860468&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/43870
• Institution: Chiang Mai University

© 2018, Springer International Publishing AG. The paper aims to quantify risk using Capital Asset Pricing Model (CAPM) of the 5 top-traded stocks in Thailand’s Stock Exchange market as well as to investigate existence of structural change in CAPM. Thus, in this paper, we compare non-linear Markov-switching CAPM with linear CAPM. In addition, we use interval-valued data instead of conventional single-valued data because of its ability to capture the whole period rather than a point of time. This paper, therefore, introduces an approach to fit both Markov-switching and linear CAPM to interval-valued data. Interval value of each stock return is retrieved from its midpoint to fit in Markov-switching and linear regression estimations which apply the midpoint of interval value of market return. From empirical analysis, the results are satisfactory as AIC judged that our Markov-switching CAPM outperforms the linear benchmark four out of five stocks.