Pub Date : 2024-10-14DOI: 10.1016/j.najef.2024.102295
Limin Wen , Junxue Li , Jiliang Sheng , Yi Zhang
This paper establishes an active portfolio model that considers corporate Environmental, Social, and Governance (ESG) ratings, examining the impact of ESG information on portfolio performance. Based on the exponential utility function, the paper incorporates ESG scores and ESG risk (uncertainty factors) into active portfolio management and derives the analytical solution of the model. Theoretical findings indicate that ESG risk adjusts the optimal portfolio, helping to mitigate losses due to ESG divergence. The paper conducts empirical research using ESG ratings from three well-known rating agencies and the CSI300 index. The empirical results demonstrate that ESG preferences enhance the ESG quality of the portfolio. Consistent with theoretical predictions, reliance on a single ESG rating may lead to adverse outcomes, especially when the selected rating agency’s standards deviate from market norms. In contrast, portfolios that include ESG uncertainty exhibit higher stability and lower loss risk, showing good robustness across different stages and industries.
{"title":"Active portfolio management in the face of ESG uncertainty: An agile framework for adaptive investment strategies","authors":"Limin Wen , Junxue Li , Jiliang Sheng , Yi Zhang","doi":"10.1016/j.najef.2024.102295","DOIUrl":"10.1016/j.najef.2024.102295","url":null,"abstract":"<div><div>This paper establishes an active portfolio model that considers corporate Environmental, Social, and Governance (ESG) ratings, examining the impact of ESG information on portfolio performance. Based on the exponential utility function, the paper incorporates ESG scores and ESG risk (uncertainty factors) into active portfolio management and derives the analytical solution of the model. Theoretical findings indicate that ESG risk adjusts the optimal portfolio, helping to mitigate losses due to ESG divergence. The paper conducts empirical research using ESG ratings from three well-known rating agencies and the CSI300 index. The empirical results demonstrate that ESG preferences enhance the ESG quality of the portfolio. Consistent with theoretical predictions, reliance on a single ESG rating may lead to adverse outcomes, especially when the selected rating agency’s standards deviate from market norms. In contrast, portfolios that include ESG uncertainty exhibit higher stability and lower loss risk, showing good robustness across different stages and industries.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102295"},"PeriodicalIF":3.8,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-12DOI: 10.1016/j.najef.2024.102298
Jinfang Li
We present a dynamic asset pricing model combining individual investor sentiment, higher order expectations with learning. In the basic model, the forward-looking expectation of individual investors is distorted by individual sentiment and higher order expectations, so prices react more sluggishly to changes in fundamentals of the asset. We find that investor sentiment plays a significant role in the effect of higher order expectations on asset pricing. Investor sentiment not only makes the price tightly anchor to the initial price, but also increases the sentiment drift of the price. Higher order expectations exhibit inertia, therefore aggravating the anchor to the initial price. With the increase of the order, more and more investor sentiment is integrated into the prices, amplifying the bias of pubic signal relative to fundamentals. When individual sentiment investors learn valuable public information through price system in the long term, the information component of the equilibrium price increases, thus drawing the asset price back toward the rational expected value. The model could offer a partial explanation to the inertia and drift in the price path.
{"title":"Higher order expectations, learning, and sentiment pricing dynamics","authors":"Jinfang Li","doi":"10.1016/j.najef.2024.102298","DOIUrl":"10.1016/j.najef.2024.102298","url":null,"abstract":"<div><div>We present a dynamic asset pricing model combining individual investor sentiment, higher order expectations with learning. In the basic model, the forward-looking expectation of individual investors is distorted by individual sentiment and higher order expectations, so prices react more sluggishly to changes in fundamentals of the asset. We find that investor sentiment plays a significant role in the effect of higher order expectations on asset pricing. Investor sentiment not only makes the price tightly anchor to the initial price, but also increases the sentiment drift of the price. Higher order expectations exhibit inertia, therefore aggravating the anchor to the initial price. With the increase of the order, more and more investor sentiment is integrated into the prices, amplifying the bias of pubic signal relative to fundamentals. When individual sentiment investors learn valuable public information through price system in the long term, the information component of the equilibrium price increases, thus drawing the asset price back toward the rational expected value. The model could offer a partial explanation to the inertia and drift in the price path.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102298"},"PeriodicalIF":3.8,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper investigates the influence of green bond (GB) issuance on the credit spread of non-green bonds (NGBs) issued by the same firm. Based on Chinese bond market data from 2013 to 2021, our results show that GB issuers experience a decline in NGB credit spreads after issuing GBs, indicating that “going green” can lower corporate debt financing costs. This beneficial effect is more salient among firms with lower bond liquidity, supporting the “bond liquidity story” that investors anticipate increased bond liquidity following GB issuance and thus charge lower credit spreads. In contrast, we find limited evidence for alternative explanations such as the “default risk story,” “halo effect story,” or “information asymmetry story.” Our research highlights the financial benefits of GB issuance and contributes to related literature on the economic implications of green finance. The findings also offer valuable insights for policymakers and corporate executives seeking to promote sustainable investment.
{"title":"Going Green: Effect of green bond issuance on corporate debt financing costs","authors":"Qingsong Ruan , Chengyu Li , Dayong Lv , Xiaokun Wei","doi":"10.1016/j.najef.2024.102299","DOIUrl":"10.1016/j.najef.2024.102299","url":null,"abstract":"<div><div>This paper investigates the influence of green bond (GB) issuance on the credit spread of non-green bonds (NGBs) issued by the same firm. Based on Chinese bond market data from 2013 to 2021, our results show that GB issuers experience a decline in NGB credit spreads after issuing GBs, indicating that “going green” can lower corporate debt financing costs. This beneficial effect is more salient among firms with lower bond liquidity, supporting the “bond liquidity story” that investors anticipate increased bond liquidity following GB issuance and thus charge lower credit spreads. In contrast, we find limited evidence for alternative explanations such as the “default risk story,” “halo effect story,” or “information asymmetry story.” Our research highlights the financial benefits of GB issuance and contributes to related literature on the economic implications of green finance. The findings also offer valuable insights for policymakers and corporate executives seeking to promote sustainable investment.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102299"},"PeriodicalIF":3.8,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-09DOI: 10.1016/j.najef.2024.102285
Ya Chen, Wei Liu, Zhen Zhao
This paper investigates the problem of portfolio selection and adjustment of hybrid pension plans under longevity risk. The longevity risk is described by a time-varying mortality rate, which is an extension of Markham’s law. Suppose that the financial market assets consist of a risk-free asset, a stock, and a defaultable bond. Specifically, the stock price is described by a constant elasticity of variance (CEV) model. The objective is to minimize interim adjustments to contributions and benefits under an exponential loss function, as well as the loss of terminal wealth. It is difficult for investors to fully understand the market information, so there is uncertainty in the financial market. By applying robust control theory to formulate investors’ aversion to uncertainty, we obtain the -robust optimal investment strategies and the adjustment strategies. Finally, numerical analysis is presented to discuss the influence of the model parameters on the -robust optimal control strategies.
{"title":"Optimal control problem for hybrid pension plans under longevity risk for alpha-maxmin expected utility minimization","authors":"Ya Chen, Wei Liu, Zhen Zhao","doi":"10.1016/j.najef.2024.102285","DOIUrl":"10.1016/j.najef.2024.102285","url":null,"abstract":"<div><div>This paper investigates the problem of portfolio selection and adjustment of hybrid pension plans under longevity risk. The longevity risk is described by a time-varying mortality rate, which is an extension of Markham’s law. Suppose that the financial market assets consist of a risk-free asset, a stock, and a defaultable bond. Specifically, the stock price is described by a constant elasticity of variance (CEV) model. The objective is to minimize interim adjustments to contributions and benefits under an exponential loss function, as well as the loss of terminal wealth. It is difficult for investors to fully understand the market information, so there is uncertainty in the financial market. By applying robust control theory to formulate investors’ aversion to uncertainty, we obtain the <span><math><mi>α</mi></math></span>-robust optimal investment strategies and the adjustment strategies. Finally, numerical analysis is presented to discuss the influence of the model parameters on the <span><math><mi>α</mi></math></span>-robust optimal control strategies.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102285"},"PeriodicalIF":3.8,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-04DOI: 10.1016/j.najef.2024.102296
Jie Yang , Yun Feng , Hao Yang
This paper examines the coupling of China’s petrochemical-related commodity futures from the perspective of an integrated system as well as the multiscale interdependency between this system and Shanghai crude oil futures (SCM) with two globally influential benchmarks, i.e., Brent and WTI, as comparisons. Our methods innovatively build on the multifractal theory and provide in-depth analysis across various time scales. The results show the dynamic coupling of China’s oil industry chain system (ICS) can reflect its level of systemic risk concentration well. The greater the time scale, the stronger the coupling. The abrupt deterioration of the external economic environment enhanced the impact of crude oil on the ICS, but the impact from SCM increased the most. Furthermore, the higher dependency preference of ICS for SCM confirms the effectiveness of this emerging futures market in reflecting domestic oil supply and demand but continuously weakens as the time scale increases, indicating the dominance of Brent and WTI in the long run.
{"title":"Multiscale dynamic interdependency between China’s crude oil futures and petrochemical-related commodity futures: An integrated perspective from the industry chain system","authors":"Jie Yang , Yun Feng , Hao Yang","doi":"10.1016/j.najef.2024.102296","DOIUrl":"10.1016/j.najef.2024.102296","url":null,"abstract":"<div><div>This paper examines the coupling of China’s petrochemical-related commodity futures from the perspective of an integrated system as well as the multiscale interdependency between this system and Shanghai crude oil futures (SCM) with two globally influential benchmarks, i.e., Brent and WTI, as comparisons. Our methods innovatively build on the multifractal theory and provide in-depth analysis across various time scales. The results show the dynamic coupling of China’s oil industry chain system (ICS) can reflect its level of systemic risk concentration well. The greater the time scale, the stronger the coupling. The abrupt deterioration of the external economic environment enhanced the impact of crude oil on the ICS, but the impact from SCM increased the most. Furthermore, the higher dependency preference of ICS for SCM confirms the effectiveness of this emerging futures market in reflecting domestic oil supply and demand but continuously weakens as the time scale increases, indicating the dominance of Brent and WTI in the long run.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102296"},"PeriodicalIF":3.8,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-01DOI: 10.1016/j.najef.2024.102262
Yu Yan , Yan Tong , Yiming Wang
We establish a continuous-time heterogeneous beliefs model to discuss the mechanisms of Momentum and Reversal. Price learning, information transmission and extrapolative expectation are incorporated into a unified framework for the Momentum and Reversal. The calibration results from SP500 show that the presence of Extrapolators and Information-driven Traders are important influences of Momentum and Reversal in all phases. We also find that momentum and reversal become significantly stronger as belief weights approach true belief weights.
{"title":"Momentum mechanisms under heterogeneous beliefs","authors":"Yu Yan , Yan Tong , Yiming Wang","doi":"10.1016/j.najef.2024.102262","DOIUrl":"10.1016/j.najef.2024.102262","url":null,"abstract":"<div><div>We establish a continuous-time heterogeneous beliefs model to discuss the mechanisms of Momentum and Reversal. Price learning, information transmission and extrapolative expectation are incorporated into a unified framework for the Momentum and Reversal. The calibration results from SP500 show that the presence of Extrapolators and Information-driven Traders are important influences of Momentum and Reversal in all phases. We also find that momentum and reversal become significantly stronger as belief weights approach true belief weights.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102262"},"PeriodicalIF":3.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-30DOI: 10.1016/j.najef.2024.102294
Dan Owusu Amponsah , Mohammad Abdullah , Emmanuel Joel Aikins Abakah , Joshua Yindenaba Abor , Chi-Chuan Lee
This study examines the multiscale tail risk integration between safe-haven assets and top equity markets in Africa (South Africa, Kenya, Egypt, Ghana, Nigeria, Botswana, Zambia, and Morocco) as well as portfolio implications. We further investigate the role of global economic factors in these relationships by employing Conditional Autoregressive Value at Risk and Complete Ensemble Empirical Mode Decomposition with Adaptive Noise-based TVP-VAR with data spanning from January 2010 to September 2024. Our findings show that while the equity market in South Africa is a net transmitter of tail risk spillovers, the rest of the equity markets are net receivers. They also reveal that while gold and silver transmit significant shocks to the other assets, Bitcoin receives considerable shocks from the other assets. We conclude that global economic factors and spillovers from safe-haven assets significantly affect the tail risk exposures of Africa’s equity markets. Our findings have significant implications for investment decision-making.
{"title":"Multiscale tail risk integration between safe-haven assets and Africa’s emerging equity market","authors":"Dan Owusu Amponsah , Mohammad Abdullah , Emmanuel Joel Aikins Abakah , Joshua Yindenaba Abor , Chi-Chuan Lee","doi":"10.1016/j.najef.2024.102294","DOIUrl":"10.1016/j.najef.2024.102294","url":null,"abstract":"<div><div>This study examines the multiscale tail risk integration between safe-haven assets and top equity markets in Africa (South Africa, Kenya, Egypt, Ghana, Nigeria, Botswana, Zambia, and Morocco) as well as portfolio implications. We further investigate the role of global economic factors in these relationships by employing Conditional Autoregressive Value at Risk and Complete Ensemble Empirical Mode Decomposition with Adaptive Noise-based TVP-VAR with data spanning from January 2010 to September 2024. Our findings show that while the equity market in South Africa is a net transmitter of tail risk spillovers, the rest of the equity markets are net receivers. They also reveal that while gold and silver transmit significant shocks to the other assets, Bitcoin receives considerable shocks from the other assets. We conclude that global economic factors and spillovers from safe-haven assets significantly affect the tail risk exposures of Africa’s equity markets. Our findings have significant implications for investment decision-making.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102294"},"PeriodicalIF":3.8,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.najef.2024.102291
Radu Lupu , Adrian Cantemir Călin , Dan Gabriel Dumitrescu , Iulia Lupu
This paper is devoted to the development of an innovative fragility index designed to capture comprehensively the dynamics of financial stability during periods characterized by asset bubbles. Utilizing a multifaceted methodological framework, the study begins by identifying bubble occurrences and calculating the delta CoVaR systemic risk metric. Building on established macroeconomic methodologies, we then propose an indicator to quantify the impact of financial bubbles on the stability of an emerging market. Specifically, we construct two coincident indicators based on daily observations of financial stability for the twenty most liquid Romanian companies. The first indicator is derived from the delta CoVaR values of these companies, while the second is computed using the residuals of a model that employs the same financial stability metric as the dependent variable, with a binary variable representing the presence of asset bubbles as the explanatory factor. This second coincident indicator tracks financial stability in the absence of bubble effects. The disparity between these two indicators forms the basis for the creation of an index, termed the “bubble fragility index,” which measures the overall susceptibility of financial stability to asset bubbles. In the context of the Romanian market, this study demonstrates that periods marked by asset bubbles are associated with elevated systemic risks. Our findings indicate that the presence of bubbles significantly intensifies financial risk factors, creating conditions conducive to severe market corrections and economic downturns. We identify specific intervals during which fragility reaches peak levels, including June to September 2018, December 2018 to March 2019, March 2020, and March 2022.
{"title":"Introducing a novel fragility index for assessing financial stability amid asset bubble episodes","authors":"Radu Lupu , Adrian Cantemir Călin , Dan Gabriel Dumitrescu , Iulia Lupu","doi":"10.1016/j.najef.2024.102291","DOIUrl":"10.1016/j.najef.2024.102291","url":null,"abstract":"<div><div>This paper is devoted to the development of an innovative fragility index designed to capture comprehensively the dynamics of financial stability during periods characterized by asset bubbles. Utilizing a multifaceted methodological framework, the study begins by identifying bubble occurrences and calculating the delta CoVaR systemic risk metric. Building on established macroeconomic methodologies, we then propose an indicator to quantify the impact of financial bubbles on the stability of an emerging market. Specifically, we construct two coincident indicators based on daily observations of financial stability for the twenty most liquid Romanian companies. The first indicator is derived from the delta CoVaR values of these companies, while the second is computed using the residuals of a model that employs the same financial stability metric as the dependent variable, with a binary variable representing the presence of asset bubbles as the explanatory factor. This second coincident indicator tracks financial stability in the absence of bubble effects. The disparity between these two indicators forms the basis for the creation of an index, termed the “bubble fragility index,” which measures the overall susceptibility of financial stability to asset bubbles. In the context of the Romanian market, this study demonstrates that periods marked by asset bubbles are associated with elevated systemic risks. Our findings indicate that the presence of bubbles significantly intensifies financial risk factors, creating conditions conducive to severe market corrections and economic downturns. We identify specific intervals during which fragility reaches peak levels, including June to September 2018, December 2018 to March 2019, March 2020, and March 2022.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102291"},"PeriodicalIF":3.8,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.najef.2024.102293
Chia-Hsien Tang , Hung-Chun Liu , Yen-Hsien Lee , Yuan-Teng Hsu
This study investigates the relationship between risk factors of Environmental, Social, and Governance (ESG) and the downside risk of U.S. firms and tackles the role of economic policy uncertainty (EPU) in this relationship. Our results show that the downside risk of firms, as measured by value-at-risk and lower partial moment, is positively affected by ESG risk scores, and that this effect becomes more pronounced as EPU rises. These results are robust to two other alternative measures of ESG risk. We argue that enhancing ESG management and adaptability to economic uncertainty is crucial for aligning with sustainable development goals. Our findings provide valuable insights for U.S. firms, investors, and policymakers looking to navigate the evolving risk landscape.
{"title":"ESG risk, economic policy uncertainty, and the downside risk: Evidence from US firms","authors":"Chia-Hsien Tang , Hung-Chun Liu , Yen-Hsien Lee , Yuan-Teng Hsu","doi":"10.1016/j.najef.2024.102293","DOIUrl":"10.1016/j.najef.2024.102293","url":null,"abstract":"<div><div>This study investigates the relationship between risk factors of Environmental, Social, and Governance (ESG) and the downside risk of U.S. firms and tackles the role of economic policy uncertainty (EPU) in this relationship. Our results show that the downside risk of firms, as measured by value-at-risk and lower partial moment, is positively affected by ESG risk scores, and that this effect becomes more pronounced as EPU rises. These results are robust to two other alternative measures of ESG risk. We argue that enhancing ESG management and adaptability to economic uncertainty is crucial for aligning with sustainable development goals. Our findings provide valuable insights for U.S. firms, investors, and policymakers looking to navigate the evolving risk landscape.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102293"},"PeriodicalIF":3.8,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.najef.2024.102292
Masoumeh Fathi , Klaus Grobys , Janne Äijö
This is the first study that explicitly explores the risk of the Fama and French equity factors in terms of their realized variances. Our results show that realized factor variances exhibit strong power-law behavior. A striking commonality is that the power-law exponents are close to α ≈ 2 regardless of which factor variance is analyzed. Notably, our novel joint test designed to test Mandelbrot’s infinite variance hypothesis in the cross-section of realized factor variances shows that the null hypothesis of α = 1.9 cannot be rejected, which further corroborates the evidence that (a) there exist a common component governing factor variance risk, and (b) factor variance risk is statistically undefined. Further evidence derived from co-fractality analysis shows that (c) risk diversification appears to be very limited as factor variances tend to exhibit power-law behavior coincidently. We argue that our study has several theoretical and practical implications—especially due to the fact that factor investing reached $5 trillion in assets under management.
{"title":"A common component of Fama and French factor variances","authors":"Masoumeh Fathi , Klaus Grobys , Janne Äijö","doi":"10.1016/j.najef.2024.102292","DOIUrl":"10.1016/j.najef.2024.102292","url":null,"abstract":"<div><div>This is the first study that explicitly explores the risk of the Fama and French equity factors in terms of their realized variances. Our results show that realized factor variances exhibit strong power-law behavior. A striking commonality is that the power-law exponents are close to α ≈ 2 regardless of which factor variance is analyzed. Notably, our novel joint test designed to test Mandelbrot’s infinite variance hypothesis in the cross-section of realized factor variances shows that the null hypothesis of α = 1.9 cannot be rejected, which further corroborates the evidence that (a) there exist a common component governing factor variance risk, and (b) factor variance risk is statistically undefined. Further evidence derived from co-fractality analysis shows that (c) risk diversification appears to be very limited as factor variances tend to exhibit power-law behavior coincidently. We argue that our study has several theoretical and practical implications—especially due to the fact that factor investing reached $5 trillion in assets under management.</div></div>","PeriodicalId":47831,"journal":{"name":"North American Journal of Economics and Finance","volume":"75 ","pages":"Article 102292"},"PeriodicalIF":3.8,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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