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Title: The pricing of coskewness and cokurtosis risks on the UK stock market
Author: Kashif, Muhammad
ISNI:       0000 0004 2750 4946
Awarding Body: University of Glasgow
Current Institution: University of Glasgow
Date of Award: 2013
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This thesis explores the asset pricing implication of higher moments of return distributions on the UK stock market. It is found that in a market populated by risk-averse, prudent and temperate investors, firms whose returns exhibit negative coskewness (CSK) or positive cokurtosis (CKT) yield higher premia relative to counterpart firms with positive coskewness and negative cokurtosis respectively. Furthermore, results show that CSK and CKT are genuinely priced in the UK stock markets and outperform the covariance risk, size, value, and momentum factors in explaining the expected cross-sectional variation in asset returns. It is further found that a theoretically motivated, higher co-moment asset pricing model has a significant explanatory ability over the cross-section of CSK and CKT portfolio returns. A CSK- and CKT-augmented CAPM performed better in explaining the cross-sectional variation in expected returns as compared to empirically-motivated asset pricing models, such as the three-factor model (Fama-French 1996) and the four-factor model (Carhart 1997). In particular, a unit factor loading of CSK risk yields a statistically significant monthly premium of 0.22% (2.64% p.a.) across CSK portfolios and a unit factor of CKT risk 0.15% (1.8% p.a.) across the CKT portfolios. Motivated by the significance of CSK and CKT, this thesis also explores whether higher co-moments of asset returns can explain the profitability of a number of investment strategies; size, value, asset growth, accruals, dividend yield, net stock issue and momentum. In particular, this study shows that in the UK stock market, firms with low asset growth and net-stock issue have higher subsequent stock returns compared to counterpart firms with high asset growth and net-stock issue. Furthermore, the performance of the above investment strategies continues even if their portfolio returns are adjusted for risk factors such as size, value, and momentum of the Fama-French three-factor (1993) and Carhart four-factor (1997) models. The introduction of CSK and CKT factor loadings into commonly used asset pricing models shows a slight decrease in the profitability of size, value, asset growth and net-stock issue but returns remain significantly positive. However, CSK and CKT factor loadings have no impact on the profitability of momentum, dividend yield and accruals strategies. Overall, risk-adjusted performance of the above investment strategies remains intact in the UK stock markets during 1990 to 2008. The use of higher moments is suggested when exploring risk-adjusted returns.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: H Social Sciences (General) ; HB Economic Theory ; HG Finance