0000000000311283

AUTHOR

Mohamed Zouaoui

showing 15 related works from this author

Drought stress impacts the microbiota mediating iron dynamic in the pea rhizosphere

2022

Agroécologie, INRAE, Institut Agro, Université de Bourgogne - Université de Bourgogne Franche-Comté, Dijon, FranceMicrobiota, with their consortia of genomes, extend the genetic repertoires of host plants to form ‘extended genotypes’, resulting in extended host phenotypes. Trecently, the term ‘holobiont’, which encompasses the host plant plus its associated microbiota, has been proposedHow environmental properties impact both the plant and microbial components of the holobiont, and its phenotype, still remain to be explored.We addressed this question by testing the impact of different abiotic conditions (drought stress and soil pH) on plant and microbial phenotypes in relation to iron. Iron…

[SDV] Life Sciences [q-bio]microbiota;rhizosphere;pea;iron;drought;pea
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L’édito du rapport de développement durable : un signal prédictif d’inclusion d’une entreprise dans un indice de performance RSE ?

2019

International audience

Développement durableIndice de performance[SHS.GESTION]Humanities and Social Sciences/Business administration[SHS.GESTION] Humanities and Social Sciences/Business administrationComputingMilieux_MISCELLANEOUSRSE
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Is Sentiment Risk Priced By Stock Market?

2012

International audience; This study tests if the financial markets price the investors sentiment risk. We construct portfolios based upon the stock returns exposure to sentiment. Our results show that the portfolio returns are positively correlated with the exposure of stocks to sentiment. The strategy that consists of buying stocks with the highest exposure to sentiment and selling stocks with the lowest exposure to sentiment generates a significant raw profit. Exploring the sources of profit, we find that neither the traditional risk factors nor the momentum factor can account for the profit. However, we find that the addition of the sentiment risk premium contributes to explain the profit.

investor sentiment;stock returns;noise trader riskProfit (accounting)Financial economicsRisk premiumBehavioral economicsBehavioral FinanceProfit (economics)0502 economics and businessEconomicsBusiness and International Management050207 economics[ SHS.GESTION ] Humanities and Social Sciences/Business administrationStock (geology)050208 finance05 social sciencesFinancial marketMomentum factorStock Returnsjel:G12jel:G11jel:G14Noise Trader RiskPortfolio[SHS.GESTION]Humanities and Social Sciences/Business administrationStock marketInvestor Sentiment
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Effet des changements de dirigeant sur la performance RSE des entreprises cotées.Le cas français (1999-2011). Does CEOs' turnover influence CSP of li…

2015

(VF)Alors que les études portant sur le lien entre mécanismes de gouvernance et performance RSE ont été menées dans le contexte d'économies émergentes, avec une législation environnementale assez récente. Cette étude est menée en France, pays développé où la legislation en matière de reporting sur le développement durable est prégnante. La France est en avance car elle est le premier pays d’Europe à avoir créé une législation en termes de reporting sur le développement durable. La loi de 2001 sur les nouvelles régulations économiques (renforcée en 2010 par la loi dite « Grenelle II ») impose aux entreprises cotées de publier leurs données sociales et environnementales en même temps que leur…

jel:G39performance;RSE;changement de dirigeant;GRI;corporate social performance;turnover;top executive
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Measuring investor sentiment in the stock market

2011

Recently, investor sentiment measures have become one of the more widely examined areas in behavioral finance. A number of measures have been developed in the literature without having been fully validated, and therefore leaving in question which measure should be used for empirical exploration. The purpose of this study is to examine the relative performance of a number of popular measures in predicting stock returns and to test the relative efficacy of a hybrid approach. Using a panel of investor sentiment measures, we develop a new measure of sentiment which combines direct and indirect sentiment measures. Our results show that our composite sentiment index affects the returns of stocks …

Relative efficacyFinancial economicsBehavioral economicsHybrid approachjel:G12sentiment measures;composite index;stock returns.jel:G14Noise traderEconometricsStock marketBusinessArbitrageComposite indexStock (geology)
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L'apport du sentiment de l'investisseur dans l'explication des crises boursières : Une analyse en données de panel

2011

Un debat tres anime portant sur le lien entre les aspects comportementaux des investisseurs et les marches financiers s’est largement developpe au cours de la derniere decennie. La presente etude teste l’impact du sentiment de l’investisseur sur un panel de marches boursiers internationaux. Nous etudions l’influence du sentiment de l’investisseur sur la probabilite de survenance des crises boursieres. Nos resultats montrent que les crises boursieres sont precedees de periodes de montee de l’euphorie des investisseurs.

050208 financeUne analysedonnées de panel0502 economics and business05 social sciences[SHS.GESTION]Humanities and Social Sciences/Business administration050207 economicsapport du sentiment de l'investisseurcrises boursières[SHS.GESTION] Humanities and Social Sciences/Business administration[ SHS.GESTION ] Humanities and Social Sciences/Business administration
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Noise traders and smart money: Evidence from online searches

2019

International audience; Traditional finance theory considers that the impact of noise traders' attention on asset prices is offset by attention from smart investors. This paper uses online search data to study the influence of noise traders and smart investors on stock returns and volatility. Adopting an original approach, we construct a proxy for smart investor attention based on investors' online search behavior provided by Wikipedia Page Traffic. We combine this new measure with a standard measure of noise traders' attention as proxied by Google Search Volume Index. We show for a sample of 87 French firms over the period 2008–2018 that only noise traders' attention influences stock retur…

Economics and Econometrics050208 financeOffset (computer science)Financial economics05 social sciencesBehavioral economicsStandard measure[SHS.ECO]Humanities and Social Sciences/Economics and FinanceSmart investorsBehavioral financeNoise tradersOnline search0502 economics and businessEconomicsComputingMilieux_COMPUTERSANDSOCIETYPrice pressure hypothesis[SHS.GESTION]Humanities and Social Sciences/Business administration050207 economicsVolatility (finance)Attention measuresStock (geology)
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Is Big Brother Watching Us? Google, Investor Sentiment and the Stock Market

2013

International audience; This paper proposes a novel measure of French investor sentiment based on the volume of internet search reported by Google Trends. We find that our sentiment indicator correlates well with alternative sentiment measures often used in the literature. Furthermore, we find that investor sentiment influences the behavior of mutual fund investors. The results also reveal evidence about short-run predictability in return. An increase in our sentiment index leads to short-term return reversal. The reversal pattern is more pronounced for smaller firms than larger firms, consistent with the predictions of noise trader's models.

Index (economics)Financial economicsbusiness.industryGoogle TrendsInvestor sentimentBrotherStock returnsjel:G0Google Trends Investor sentiment VAR model Stock returnsjel:G1Noise traderEconomics[SHS.GESTION]Humanities and Social Sciences/Business administrationStock marketThe InternetPredictabilitybusiness[ SHS.GESTION ] Humanities and Social Sciences/Business administration[SHS.GESTION] Humanities and Social Sciences/Business administrationMutual fund
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Médias et sentiment sur les marchés actions européens : influence de la culture nationale

2018

Dans cet article, nous développons une nouvelle mesure du sentiment des investisseurs en Europe à partir d’une analyse de contenus d’articles issus du Financial Times. Dans la lignée des travaux de finance comportementale, nous trouvons que notre mesure du sentiment influence la performance boursière des entreprises difficiles à évaluer et à arbitrer. Par ailleurs, nous montrons que la culture nationale influence le lien entre sentiment des investisseurs et rentabilités boursières. L’impact du sentiment se révèle plus prononcé pour les pays les plus culturellement enclins à des comportements de sur-réaction ou grégaires.

Media050208 financeSocial Sciences and HumanitiesMédiassentimiento de los inversores05 social sciencesinvestor sentimentsentiment de l’investisseurGeneral Medicinemarchés financiersstock marketsculturamercados financierosculture0502 economics and businessSciences Humaines et Sociales050207 economicsmedios
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Excess control, pyramids and corporate social responsibility

2020

International audience

[SHS] Humanities and Social SciencesComputingMilieux_MISCELLANEOUS[SHS]Humanities and Social Sciences
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Impact du sentiment de l'investisseur sur les marchés financiers

2010

International audience; La présente thèse a pour objectif d''étudier de manière approfondie l''impact du sentiment sur les marchés d''actions. Dans un premier temps, nous développons une nouvelle mesure du sentiment qui regroupe à la fois des indicateurs directs et des indicateurs indirects. En utilisant un modèle à vecteurs autorégressifs, nous montrons que le sentiment de l''investisseur affecte les rentabilités des titres difficiles à évaluer et à arbitrer. Dans un deuxième temps, nous construisons des portefeuilles sur la base de l''exposition des titres au facteur sentiment. Nos résultats montrent que la performance des portefeuilles est positivement corrélée à l''exposition des titres…

gestion[SHS.GESTION]Humanities and Social Sciences/Business administration[SHS.GESTION] Humanities and Social Sciences/Business administrationadministration
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Do Investors Care About Noise Trader Risk?

2011

International audience; The link between investor sentiment and asset valuation is at the center of a long-running debate in behavioral finance. Using a new composite sentiment indicator, we show that the conventional risk does not explain the abnormal returns of portfolios most sensitive to the sentiment factor. Our result supports the existence of a sentiment risk valued by financial markets. We also find that the firms more impacted by the sentiment risk correspond to difficult-to-arbitrage and hard-to-value stocks, e.g. small stocks, growth stocks, young stocks, unprofitable stocks, lower dividend-paying stocks, intangible stocks and high volatility stocks.

investor sentiment;asset valuation;behavioral finance;abnormal returns of portfolios.sentiment indicator[SHS.GESTION]Humanities and Social Sciences/Business administrationinvestorjel:G12[ SHS.GESTION ] Humanities and Social Sciences/Business administration[SHS.GESTION] Humanities and Social Sciences/Business administrationBehavioral Financejel:G11
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Effet des changements de dirigeants sur la performance RSE des entreprises cotées. Le cas français 1999-2011

2016

Tite du congrès : «La responsabilité sociale des organisations et des établissements d’enseignement supérieur»; International audience

RSE Responsabilité Sociale Entreprise[SHS.GESTION]Humanities and Social Sciences/Business administrationEntreprise cotéeDirigeants d'entreprises[SHS.GESTION] Humanities and Social Sciences/Business administration
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How Does Investor Sentiment Affect StockMarket Crises? Evidence from Panel Data

2011

Investor Sentiment Affect StockMarket Crises[SHS.GESTION]Humanities and Social Sciences/Business administration[SHS.GESTION] Humanities and Social Sciences/Business administration[ SHS.GESTION ] Humanities and Social Sciences/Business administrationEvidence from Panel Data
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The effect of CEOs’ turnover on the CSP of French firms

2016

International audience

CEOGRICorporate governance[SHS.GESTION]Humanities and Social Sciences/Business administration[SHS.GESTION] Humanities and Social Sciences/Business administration[ SHS.GESTION ] Humanities and Social Sciences/Business administrationTurnoverComputingMilieux_MISCELLANEOUSCorporate sustainability performance (CSP)
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