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Article
Publication date: 7 June 2018

Omid Sabbaghi and Navid Sabbaghi

This study aims to provide one of the first empirical investigations of market efficiency for developed markets during the recent global financial crisis.

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Abstract

Purpose

This study aims to provide one of the first empirical investigations of market efficiency for developed markets during the recent global financial crisis.

Design/methodology/approach

Using the Morgan Stanley Capital International (MSCI) country indices as proxies for national stock markets, the study conducts a battery of econometric tests in assessing weak-form market efficiency for the developed markets.

Findings

The inferential outcomes are consistent among the different tests. Specifically, the study finds that the majority of developed markets are weak-form efficient while the USA is the sole equity market to be commonly diagnosed as weak-form inefficient across the different tests when using full period data spanning the January 2008-November 2011 period. However, when basing the analysis on one-year subsamples over the identical time period, this study fails to reject weak-form market efficiency for all of the developed markets and presents evidence consistent with the Adaptive Market Hypothesis as described by Urquhart and Hudson (2013). When applying technical analysis for the case of the USA over the full study period, the results indicate that the return predictabilities can be exploited for some horizon of variable length moving average (VMA) trading rules.

Originality/value

This study provides one of the first empirical investigations of market efficiency for developed markets during the recent global financial crisis using an extended set of econometric tests. The study contributes to the existing body of empirical research that formally assesses the impact of a financial crisis on stock market efficiency and underlines the significance and relevance of examining market efficiency through subsample analysis.

Details

Studies in Economics and Finance, vol. 35 no. 3
Type: Research Article
ISSN: 1086-7376

Keywords

Article
Publication date: 5 June 2018

Omid Sabbaghi, Jing Li and Navid Sabbaghi

This study aims to investigate the cross-sectional and time-series dynamics of realized Certified Emission Reduction (CER) credits issued and the role of investments for a seminal…

Abstract

Purpose

This study aims to investigate the cross-sectional and time-series dynamics of realized Certified Emission Reduction (CER) credits issued and the role of investments for a seminal sample of China’s Clean Development Mechanism (CDM) projects specializing in the wind sector.

Design/methodology/approach

The study investigates the dynamics of realized CER credits issued and the role of investments using traditional cross-sectional and time-series regression analysis.

Findings

The study results find that the level of investment per megawatt (MW) of power generation is an important predictor for the expected number of realized CER credits issued in the cross-section of China’s wind CDM projects. Additionally, the study finds evidence of time trends and seasonality when examining the time series of realized monthly CER credits: CER credits issued are lower in the summer and higher in the winter.

Originality/value

The study results highlight the importance of financing CDM projects and suggest guidelines in which investors are able to better assess how much to invest based on the anticipated CER credits in the Project Design Document. Additionally, the results suggest opportunities for the CDM Executive Board surrounding the Project Design Document and the anticipated CER credits contained therein. The present study contributes to the literature on strategic tools for addressing climate change and offer insights that narrow the gap between empirical finance and sustainable business practice in the context of CDM projects.

Details

International Journal of Energy Sector Management, vol. 12 no. 3
Type: Research Article
ISSN: 1750-6220

Keywords

Article
Publication date: 11 May 2015

Omid Sabbaghi

This paper aims to examine the nexus between the pricing of market-wide volatility risk and distress risk in the cross-section of portfolio returns for the 1990-2011 time period…

Abstract

Purpose

This paper aims to examine the nexus between the pricing of market-wide volatility risk and distress risk in the cross-section of portfolio returns for the 1990-2011 time period. The author expands upon prior research by constructing an ex post factor that mimics aggregate volatility risk based on the new VIX index of the Chicago Board Options Exchange, termed FVIX, as well as focuses on volatility risk in crisis versus non-crisis time periods.

Design/methodology/approach

The author investigates the relationship between volatility and distress risk using several techniques in the empirical finance literature. Specifically, the author investigates the behavior of correlations between risk factors as well as the correlations between factor loadings when using the Fama and French research portfolios as our test assets for different time periods. Additionally, the author examines the variation in the volatility factor loadings across the size- and value-sorted portfolios and assesses whether augmenting conventional pricing models with a volatility factor leads to a higher goodness-of-fit in pricing the 25 size- and value-sorted portfolios.

Findings

The author’s results suggest that factor volatilities are high during periods of market turmoil. In addition, the author presents evidence indicating that a factor mimicking innovation in volatility (based on the new VIX) is correlated with the market and momentum factors, while exhibiting the uncorrelated behavior with respect to the size, value and liquidity factors when using data from 1990 through 2011. In this paper, the author finds that the aggregate volatility factor’s correlation with the market and momentum factors increases during crisis periods. In periods of relative market tranquility, correlations decrease significantly. In examining multivariate factor loadings for the test assets, the results provide no clear pattern with regard to the variation of the volatility loadings across the book-to-market and size dimensions. Furthermore, the author finds that conventional pricing models are comparable to FVIX-augmented pricing models, in terms of goodness-of-fit, when pricing the 25 Fama-French size- and value-sorted portfolios. Additionally, when using the FVIX volatility factor to proxy for aggregate volatility risk, the coefficients are never significant statistically, thus revealing that innovations in aggregate volatility based on the new VIX index do not constitute a priced risk factor in the cross-section of returns.

Originality/value

The author’ finding indicates an absence of strong variation of the volatility factor loadings across the Fama-French research portfolios. In particular, the asset pricing results cast doubt on whether a factor mimicking innovations in aggregate volatility based on the new VIX index is priced. In agreement with prior research, the author believes that the inseparability of volatility and jump risk in the VIX can be a possible explanation of the current findings in this paper.

Details

Review of Accounting and Finance, vol. 14 no. 2
Type: Research Article
ISSN: 1475-7702

Keywords

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