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{"work":{"id":6108796,"created_at":"2014-02-17T08:42:04.496-08:00","from_world_paper_id":122733769,"updated_at":"2024-11-17T19:34:52.931-08:00","_data":{"grobid_abstract":"In real world situations the fundamental value of an asset is ambiguous. Recent theory has incorporated ambiguity in the dividend process and the information observed by investors, and studied its effect on asset prices. In this paper we experimentally study trader reaction to ambiguity when dividend information is revealed sequentially. Price changes are consistent with news revelation regarding the dividend regardless of subject experience and the degree of ambiguity. Further, there is no under or over price reactions to news. Regardless of experience, market reaction to news moves in line with fundamentals. Also, no significant differences are observed in the control versus ambiguity treatments regarding prices, price volatility and volumes for experienced subjects. Our results indicate that the role of ambiguity aversion in explaining financial anomalies is limited.","publication_date":"2011,,","grobid_abstract_attachment_id":"33016949"},"document_type":"paper","pre_hit_view_count_baseline":null,"quality":"high","language":"en","title":"Reaction to Public Information in Markets: How Much Does Ambiguity Matter","broadcastable":true,"draft":null,"has_indexable_attachment":true,"indexable":true}}["work"]; window.loswp.workCoauthors = [9236071]; window.loswp.locale = "en"; window.loswp.countryCode = "SG"; window.loswp.cwvAbTestBucket = ""; window.loswp.designVariant = "ds_vanilla"; window.loswp.fullPageMobileSutdModalVariant = "control"; window.loswp.useOptimizedScribd4genScript = false; window.loginModal = {}; window.loginModal.appleClientId = 'edu.academia.applesignon'; window.userInChina = "false";</script><script defer="" src="https://accounts.google.com/gsi/client"></script><div class="ds-loswp-container"><div class="ds-work-card--grid-container"><div class="ds-work-card--container js-loswp-work-card"><div class="ds-work-card--cover"><div class="ds-work-cover--wrapper"><div class="ds-work-cover--container"><button class="ds-work-cover--clickable js-swp-download-button" data-signup-modal="{"location":"swp-splash-paper-cover","attachmentId":33016949,"attachmentType":"pdf"}"><img alt="First page of “Reaction to Public Information in Markets: How Much Does Ambiguity Matter”" class="ds-work-cover--cover-thumbnail" src="https://0.academia-photos.com/attachment_thumbnails/33016949/mini_magick20190407-301-bkc0va.png?1554622269" /><img alt="PDF Icon" class="ds-work-cover--file-icon" src="//a.academia-assets.com/images/single_work_splash/adobe_icon.svg" /><div class="ds-work-cover--hover-container"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span><p>Download Free PDF</p></div><div class="ds-work-cover--ribbon-container">Download Free PDF</div><div class="ds-work-cover--ribbon-triangle"></div></button></div></div></div><div class="ds-work-card--work-information"><h1 class="ds-work-card--work-title">Reaction to Public Information in Markets: How Much Does Ambiguity Matter</h1><div class="ds-work-card--work-authors ds-work-card--detail"><a class="ds-work-card--author js-wsj-grid-card-author ds2-5-body-md ds2-5-body-link" data-author-id="9236071" href="https://independent.academia.edu/BriceCorgnet"><img alt="Profile image of Brice Corgnet" class="ds-work-card--author-avatar" src="//a.academia-assets.com/images/s65_no_pic.png" />Brice Corgnet</a></div><div class="ds-work-card--detail"><p class="ds-work-card--detail ds2-5-body-sm">2011</p><div class="ds-work-card--work-metadata"><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">visibility</span><p class="ds2-5-body-sm" id="work-metadata-view-count">…</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">description</span><p class="ds2-5-body-sm">57 pages</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">link</span><p class="ds2-5-body-sm">1 file</p></div></div><script>(async () => { const workId = 6108796; 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if (!viewCountBody) { throw new Error('Failed to find work views element'); } viewCountBody.textContent = `${commaizedViewCount} views`; } catch (error) { // Remove the whole views element if there was some issue parsing. document.getElementById('work-metadata-view-count')?.parentNode?.remove(); throw new Error(`Failed to parse view count: ${viewCount}`, error); } }; // If the DOM is still loading, wait for it to be ready before updating the view count. if (document.readyState === "loading") { document.addEventListener('DOMContentLoaded', () => { updateViewCount(viewCount); }); // Otherwise, just update it immediately. } else { updateViewCount(viewCount); } })();</script></div><p class="ds-work-card--work-abstract ds-work-card--detail ds2-5-body-md">In real world situations the fundamental value of an asset is ambiguous. Recent theory has incorporated ambiguity in the dividend process and the information observed by investors, and studied its effect on asset prices. In this paper we experimentally study trader reaction to ambiguity when dividend information is revealed sequentially. Price changes are consistent with news revelation regarding the dividend regardless of subject experience and the degree of ambiguity. Further, there is no under or over price reactions to news. Regardless of experience, market reaction to news moves in line with fundamentals. Also, no significant differences are observed in the control versus ambiguity treatments regarding prices, price volatility and volumes for experienced subjects. Our results indicate that the role of ambiguity aversion in explaining financial anomalies is limited.</p><div class="ds-work-card--button-container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--work-card","attachmentId":33016949,"attachmentType":"pdf","workUrl":"https://www.academia.edu/6108796/Reaction_to_Public_Information_in_Markets_How_Much_Does_Ambiguity_Matter"}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--work-card","attachmentId":33016949,"attachmentType":"pdf","workUrl":"https://www.academia.edu/6108796/Reaction_to_Public_Information_in_Markets_How_Much_Does_Ambiguity_Matter"}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div><div class="ds-signup-banner-trigger-container"><div class="ds-signup-banner-trigger ds-signup-banner-trigger-control"></div></div><div class="ds-signup-banner ds-signup-banner-control"><div id="ds-signup-banner-close-button"><button class="ds2-5-button ds2-5-button--secondary ds2-5-button--inverse"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">close</span></button></div><div class="ds-signup-banner-ctas" data-impression-entity-id="6108796" data-impression-entity-type="2" data-impression-source="signup-banner"><img src="//a.academia-assets.com/images/academia-logo-capital-white.svg" /><h4 class="ds2-5-heading-serif-sm">Sign up for access to the world's latest research</h4><button class="ds2-5-button ds2-5-button--inverse ds2-5-button--full-width js-swp-download-button" data-signup-modal="{"location":"signup-banner"}">Sign up for free<span class="material-symbols-outlined" style="font-size: 20px" translate="no">arrow_forward</span></button></div><div class="ds-signup-banner-divider"></div><div class="ds-signup-banner-reasons"><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Get notified about relevant papers</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Save papers to use in your research</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Join the discussion with peers</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Track your impact</span></div></div></div><script>(() => { // Set up signup banner show/hide behavior: // 1. 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We find that experienced traders are better at internalizing ambiguity than inexperienced subjects. No significant differences are observed in the ambiguity versus control treatments regarding prices, price volatility and volumes for experienced subjects. However, relative to the control, prices are higher, volatility greater and trading unsophisticated for inexperienced subjects in the ambiguity treatment. Price changes are consistent with news revelation regardless of subject experience and the degree of ambiguity. Further, we do not find under or over price reactions to news. Regardless of experience, market reaction to news moves in line with fundamentals.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Reaction to public information in asset markets: does ambiguity matter","attachmentId":33016951,"attachmentType":"pdf","work_url":"https://www.academia.edu/6108790/Reaction_to_public_information_in_asset_markets_does_ambiguity_matter","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/6108790/Reaction_to_public_information_in_asset_markets_does_ambiguity_matter"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="1" data-entity-id="1413861" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/1413861/Ambiguity_and_asset_prices_an_experimental_perspective">Ambiguity and asset prices: an experimental perspective</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="649569" href="https://unito.academia.edu/PaoloGhirardato">Paolo Ghirardato</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2006</p><p class="ds-related-work--abstract ds2-5-body-sm">Most of the economics and finance literature assumes that individual agents obey the Savage axioms; that is, they maximize expected utility according to subjective priors. However, Knight, Ellsberg and others argue that individual agents distinguish between risk (known probabilities) and uncertainty, or ambiguity (unknown probabilities), and that individual agents may display aversion to ambiguity, just as they display aversion to risk. This paper studies the impact of ambiguity aversion on equilibrium asset prices and portfolio holdings in competitive financial markets. It argues that attitude toward ambiguity is heterogeneous in the population, just as attitude toward risk is heterogeneous in the population, but that heterogeneity in attitude toward ambiguity has different implications than heterogeneity in attitude toward risk: agents who are sufficiently ambiguity averse find open sets of prices for which they refuse to hold an ambiguous portfolio. This leads to a wider range of state price densities and to potential reversals of ranking of state price densities. Experiments confirm the theoretical predictions.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Ambiguity and asset prices: an experimental perspective","attachmentId":9702674,"attachmentType":"pdf","work_url":"https://www.academia.edu/1413861/Ambiguity_and_asset_prices_an_experimental_perspective","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/1413861/Ambiguity_and_asset_prices_an_experimental_perspective"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="2" data-entity-id="15396215" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/15396215/Cognitive_Biases_Ambiguity_Aversion_and_Asset_Pricing_in_Financial_Markets">Cognitive Biases, Ambiguity Aversion and Asset Pricing in Financial Markets</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="34542253" href="https://independent.academia.edu/WilliamZame">William Zame</a></div><p class="ds-related-work--metadata ds2-5-body-xs">SSRN Electronic Journal, 2000</p><p class="ds-related-work--abstract ds2-5-body-sm">We test to what extent financial markets trigger comparative ignorance (Fox and Tversky (1995)) when interpreting news, and hence, to what extent such markets instill ambiguity aversion in participants who do not really know how to correctly update. Our experiments build on variations of the Monty Hall problem, which, when tested on individuals separately, are well known to generate obstinacy: subjects often refuse to acknowledge that they are wrong. Under comparative ignorance, however, subjects who are not able to correctly solve Month-Hall-like problems should become ambiguity averse. In a financial markets context, we posit that such feeling of comparative ignorance emerges when traders, who do not have the correct solution, face prices that contradict their beliefs. Previous experiments with financial markets have shown that ambiguity aversion makes subjects hold portfolios that are insensitive to prices; subjects instead prefer to hold balanced portfolios, and hence, are not exposed to ambiguity. And because subjects are price-insensitive, they do not contribute to price setting. This led us to hypothesize that, when faced with Monty-Hall-like problems, (i) there would be subjects whose portfolio decisions are insensitive to prices, (ii) price quality would be inversely related to the proportion of price-insensitive subjects, (iii) price-insensitive subjects tend to choose more balanced portfolios (correcting for mispricing), and (iv) price-insensitive subjects trade less. Our experiments confirm these hypotheses. We do discover, however, the presence of a minority of price-sensitive subjects who simply tend to buy more as prices increase. We interpret the behavior of such subjects as herding, a hitherto unsuspected reaction to comparative ignorance. Altogether, our experiments suggest that cognitive biases may be expressed differently in a financial markets setting than in traditional single-subject experiments.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Cognitive Biases, Ambiguity Aversion and Asset Pricing in Financial Markets","attachmentId":43226764,"attachmentType":"pdf","work_url":"https://www.academia.edu/15396215/Cognitive_Biases_Ambiguity_Aversion_and_Asset_Pricing_in_Financial_Markets","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/15396215/Cognitive_Biases_Ambiguity_Aversion_and_Asset_Pricing_in_Financial_Markets"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="3" data-entity-id="72815082" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/72815082/Complexity_of_information_and_trading_behavior_The_case_of_dividend_increase_announcements">Complexity of information and trading behavior: The case of dividend increase announcements</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="42727831" href="https://independent.academia.edu/IrajFooladi">Iraj Fooladi</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Economic Psychology, 2008</p><p class="ds-related-work--abstract ds2-5-body-sm">We examine the intraday trading response of participants in the common stock market and in the preferred stock market to announcements of dividend increases on common stock. We find that participants in the preferred stock market respond more slowly to the ...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Complexity of information and trading behavior: The case of dividend increase announcements","attachmentId":81591646,"attachmentType":"pdf","work_url":"https://www.academia.edu/72815082/Complexity_of_information_and_trading_behavior_The_case_of_dividend_increase_announcements","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/72815082/Complexity_of_information_and_trading_behavior_The_case_of_dividend_increase_announcements"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="4" data-entity-id="113311831" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/113311831/News_and_Expectations_in_Financial_Markets_An_Experimental_Study">News and Expectations in Financial Markets: An Experimental Study</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="35649950" href="https://independent.academia.edu/MenziesGordon">Gordon Menzies</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Social Science Research Network, 2008</p><p class="ds-related-work--abstract ds2-5-body-sm">We consider an experimental setting where agents receive one stylized piece of information at a time about the value of a financial asset. We find that Knightian uncertainty about the prior distribution of true financial asset values does not hamper decision making by agents and markets. On a mean squared error criterion, Bayesian updating is closer than simple averaging in predicting market prices and individual bids and offers, even in treatments with uncertainty where Bayesian updating should not be feasible given the limited information set. Bayesian updating also outperforms adaptive expectations in relation to market prices.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"News and Expectations in Financial Markets: An Experimental Study","attachmentId":110303507,"attachmentType":"pdf","work_url":"https://www.academia.edu/113311831/News_and_Expectations_in_Financial_Markets_An_Experimental_Study","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/113311831/News_and_Expectations_in_Financial_Markets_An_Experimental_Study"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="5" data-entity-id="17280001" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/17280001/Does_ambiguity_aversion_survive_in_experimental_asset_markets">Does ambiguity aversion survive in experimental asset markets?</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="36928957" href="https://independent.academia.edu/UtzWeitzel">Utz Weitzel</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Economic Behavior & Organization, 2014</p><p class="ds-related-work--abstract ds2-5-body-sm">Although a number of theoretical studies explain empirical puzzles in finance with ambiguity aversion, it is not a given that individual ambiguity attitudes survive in markets. In fact, despite ample evidence of ambiguity aversion in individual decision making, most studies find no or only limited ambiguity aversion in experimental financial markets, even when they exclude arbitrage. We argue that ambiguity effects in markets depend on market feedback and on a sufficiently strong bias toward ambiguity among the participants. Accordingly, we find significant ambiguity effects in low-feedback call markets for assets that provoke high ambiguity aversion, but no ambiguity effects in high-feedback double auctions.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Does ambiguity aversion survive in experimental asset markets?","attachmentId":42273675,"attachmentType":"pdf","work_url":"https://www.academia.edu/17280001/Does_ambiguity_aversion_survive_in_experimental_asset_markets","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/17280001/Does_ambiguity_aversion_survive_in_experimental_asset_markets"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="6" data-entity-id="81530327" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/81530327/Learning_under_ambiguity_An_experiment_using_initial_public_offerings_on_a_stock_market">Learning under ambiguity: An experiment using initial public offerings on a stock market</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="140293858" href="https://independent.academia.edu/UmutKeskin9">Umut Keskin</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Economics Working Paper Archive, 2013</p><p class="ds-related-work--abstract ds2-5-body-sm">This paper studies the effect of learning new information on decision under uncertainty. Using ambiguity models, we show the effect of learning on beliefs and ambiguity attitudes. We develop a new method to correct beliefs for ambiguity attitudes and decompose ambiguity attitudes into pessimism (capturing ambiguity aversion) and likelihood insensitivity. We apply our method in an experiment using initial public offerings (IPOs) on the New York Stock Exchange. IPOs provide a natural decision context in which no prior information on returns is available. We found that likelihood insensitivity decreased with information, but pessimism was unaffected. Subjects moved in the direction of expected utility with more information, but significant deviations remained. Subjective probabilities, corrected for ambiguity attitudes, were well calibrated and close to market data.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Learning under ambiguity: An experiment using initial public offerings on a stock market","attachmentId":87542277,"attachmentType":"pdf","work_url":"https://www.academia.edu/81530327/Learning_under_ambiguity_An_experiment_using_initial_public_offerings_on_a_stock_market","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/81530327/Learning_under_ambiguity_An_experiment_using_initial_public_offerings_on_a_stock_market"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="7" data-entity-id="1413857" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/1413857/Ambiguity_in_asset_markets_theory_and_experiment">Ambiguity in asset markets: theory and experiment</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="649569" href="https://unito.academia.edu/PaoloGhirardato">Paolo Ghirardato</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Review of Financial …, 2010</p><p class="ds-related-work--abstract ds2-5-body-sm">This paper studies the impact of ambiguity and ambiguity aversion on equilibrium asset prices and portfolio holdings in competitive financial markets. It argues that attitudes toward ambiguity are heterogeneous across the population, just as attitudes toward risk are heterogeneous across the population, but that heterogeneity of attitudes toward ambiguity has different implications than heterogeneity of attitudes toward risk. In particular, when some state probabilities are not known, agents who are sufficiently ambiguity averse find open sets of prices for which they refuse to hold an ambiguous portfolio. This suggests a different cross-section of portfolio choices, a wider range of state price/probability ratios and different rankings of state price/probability ratios than would be predicted if state probabilities were known. Experiments confirm all of these suggestions. Our findings contradict the claim that investors who have cognitive biases do not affect prices because they are infra-marginal: ambiguity averse investors have an indirect effect on prices because they change the per-capita amount of risk that is to be shared among the marginal investors. Our experimental data also suggest a positive correlation between risk aversion and ambiguity aversion that might explain the "value effect" in historical data.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Ambiguity in asset markets: theory and experiment","attachmentId":9702670,"attachmentType":"pdf","work_url":"https://www.academia.edu/1413857/Ambiguity_in_asset_markets_theory_and_experiment","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/1413857/Ambiguity_in_asset_markets_theory_and_experiment"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="8" data-entity-id="6108792" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/6108792/The_Effect_of_Reliability_Content_and_Timing_of_Public_Announcements_on_Asset_Trading_Behavior">The Effect of Reliability, Content and Timing of Public Announcements on Asset Trading Behavior</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="9236071" href="https://independent.academia.edu/BriceCorgnet">Brice Corgnet</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2011</p><p class="ds-related-work--abstract ds2-5-body-sm">Financial markets are overwhelmed by daily announcements. We use experimental asset markets to assess the impact of releasing public messages with different levels of reliability on asset prices. Subjects receive qualitative announcements in predetermined trading periods that are either preset by the experimenter, randomly selected, or determined by past asset market prices. We find that messages can play a significant role in bubble abatement, or rekindling. The preset message, "The price is too high," decreases the amplitude and duration of bubbles for inexperienced subjects.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"The Effect of Reliability, Content and Timing of Public Announcements on Asset Trading Behavior","attachmentId":33016946,"attachmentType":"pdf","work_url":"https://www.academia.edu/6108792/The_Effect_of_Reliability_Content_and_Timing_of_Public_Announcements_on_Asset_Trading_Behavior","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/6108792/The_Effect_of_Reliability_Content_and_Timing_of_Public_Announcements_on_Asset_Trading_Behavior"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="9" data-entity-id="6108791" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/6108791/Uninformative_announcements_and_asset_trading_behavior">Uninformative announcements and asset trading behavior</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="9236071" href="https://independent.academia.edu/BriceCorgnet">Brice Corgnet</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2007</p><p class="ds-related-work--abstract ds2-5-body-sm">Financial markets are overwhelmed by daily announcements. We use experimental asset markets to assess the impact of uninformative communications on asset prices and trading volumes. We deliver uninformative messages in standard experimental asset markets and find that trading volumes and prices are impacted by these messages. In particular, the release of a pre-announced preset message to traders "The price is too high" in predetermined trading periods decreases the amplitude and duration of bubbles. Also, the release of the messages "The price is too high" or "The price is too low" reduces trading volume with inexperienced subjects.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Uninformative announcements and asset trading behavior","attachmentId":33016948,"attachmentType":"pdf","work_url":"https://www.academia.edu/6108791/Uninformative_announcements_and_asset_trading_behavior","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/6108791/Uninformative_announcements_and_asset_trading_behavior"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div></div></div><div class="ds-sticky-ctas--wrapper js-loswp-sticky-ctas hidden"><div class="ds-sticky-ctas--grid-container"><div class="ds-sticky-ctas--container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--sticky-ctas","attachmentId":33016949,"attachmentType":"pdf","workUrl":null}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--sticky-ctas","attachmentId":33016949,"attachmentType":"pdf","workUrl":null}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div><div class="ds-below-fold--grid-container"><div class="ds-work--container js-loswp-embedded-document"><div class="attachment_preview" data-attachment="Attachment_33016949" style="display: none"><div class="js-scribd-document-container"><div class="scribd--document-loading js-scribd-document-loader" style="display: block;"><img alt="Loading..." src="//a.academia-assets.com/images/loaders/paper-load.gif" /><p>Loading Preview</p></div></div><div style="text-align: center;"><div class="scribd--no-preview-alert js-preview-unavailable"><p>Sorry, preview is currently unavailable. 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ds2-5-body-xs">Pacific-Basin Finance Journal, 2012</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"How do investors react under uncertainty?","attachmentId":83635977,"attachmentType":"pdf","work_url":"https://www.academia.edu/75955015/How_do_investors_react_under_uncertainty","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/75955015/How_do_investors_react_under_uncertainty"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container 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