{"id":1862,"date":"2019-06-15T17:35:00","date_gmt":"2019-06-15T17:35:00","guid":{"rendered":"https:\/\/analystprep.com\/cfa-level-1-exam\/?p=1862"},"modified":"2025-04-08T12:12:24","modified_gmt":"2025-04-08T12:12:24","slug":"behavioral-finance","status":"publish","type":"post","link":"https:\/\/analystprep.com\/cfa-level-1-exam\/equity\/behavioral-finance\/","title":{"rendered":"Behavioral Finance"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"VideoObject\",\n  \"name\": \"Market Efficiency (2025 Level I CFA\u00ae Exam \u2013 Equity \u2013 Module 3)\",\n  \"description\": \"This video lesson covers market efficiency in equity investments, explaining its significance to investors, the difference between market and intrinsic value, and factors influencing efficiency. It explores forms of market efficiency\u2014weak, semi-strong, and strong\u2014and their impact on analysis and portfolio strategies. It also examines market anomalies and insights from behavioral finance.\",\n  \"uploadDate\": \"2022-05-10T00:00:00+00:00\",\n  \"thumbnailUrl\": \"https:\/\/img.youtube.com\/vi\/7Ub4Gt-0nMs\/maxresdefault.jpg\",\n  \"contentUrl\": \"https:\/\/www.youtube.com\/watch?v=7Ub4Gt-0nMs\",\n  \"embedUrl\": \"https:\/\/www.youtube.com\/embed\/7Ub4Gt-0nMs\",\n  \"duration\": \"PT1H05M44S\"\n}\n<\/script>\n\n\n\n\n<p>\n<\/p>\n<p>[vsw id=&#8221;7Ub4Gt-0nMs&#8221; source=&#8221;youtube&#8221; width=&#8221;611&#8243; height=&#8221;344&#8243; autoplay=&#8221;no&#8221;]<\/p>\n<p>\n \n<p>Behavioral finance examines investor behavior to understand how people make decisions, individually and collectively. Behavioral finance does not assume that investors always act rationally but instead that people can be negatively affected by behavioral biases.<\/p>\n<p>Market efficiency does not require all market participants to act rationally as long as the market acts rationally in aggregate. If the market can adjust for irrationality quickly, then behavioral finance does not necessarily contradict market efficiency. However, if the market allows its participants to earn abnormal returns from the irrationality of others, then the market cannot be efficient.<\/p>\n<h2><strong>Loss Aversion Bias<\/strong><\/h2>\n<p>People tend to dislike losses more than they like comparable gains. This may help to explain under-reaction and overreaction market anomalies.<\/p>\n<h2><strong>Herding Bias<\/strong><\/h2>\n<p>Market participants tend to trade along with other investors while potentially ignoring their own private information or analysis. This bias may also serve as a possible explanation for the under-reaction and overreaction market anomalies.<\/p>\n<h2><strong>Information Cascades<\/strong><\/h2>\n<p>Similar to herding, information cascade is the transmission of information from those who act first and whose decisions influence the decisions of others. As investors base their decisions on the actions of other investors acting before them, stock returns may be serially correlated and lead to over-reaction anomalies. In addition, research has shown information cascades to be greater for companies with poor-quality information.<\/p>\n<h2><strong>Overconfidence Bias<\/strong><\/h2>\n<p>People tend to overestimate their ability to determine intrinsic values accurately and may not process information appropriately as a result, which ultimately leads to mispriced securities. This mispricing has been shown to mainly take place in higher-growth companies, whose prices react slowly to new information.<\/p>\n<h2><strong>Other Biases<\/strong><\/h2>\n<p>Other biases include representativeness (overweighting current situation in making decisions), mental accounting (separately accounting for different investments and individual security gains\/losses), conservatism (maintaining prior views or forecasts despite new information), and narrow framing (viewing issues in isolation and responding based on how issues are posed).<\/p>\n<p>\u00a0<\/p>\n<blockquote>\n<h2><strong>Question<\/strong><\/h2>\n<p>A scientist runs a series of unweighted coin-flipping experiments with Bob, Bill, and Jane as test subjects.<\/p>\n<ul>\n<li>The scientist first invites Bob to wager $100 on the result of the coin flip, offering $300 if Bob is correct. Bob refuses.<\/li>\n<li>Bill, however, is willing to pay $100 for the chance to win $150 ($50 profit) on correctly calling heads or tails because he recently lost $50 in a casino and it is important that he breaks even on gambles for the week.<\/li>\n<li>Finally, the scientist does not ask Jane to wager money but instead offers her a choice of taking $50 or winning $100 if the next coin flip comes up heads. Jane takes the $50.<\/li>\n<\/ul>\n<p>Which investor has acted rationally?<\/p>\n<ol style=\"list-style-type: upper-alpha;\">\n<li data-tadv-p=\"keep\">Bob.<\/li>\n<li data-tadv-p=\"keep\">Bill.<\/li>\n<li data-tadv-p=\"keep\">Jane.<\/li>\n<\/ol>\n<p><strong>Solution<\/strong><\/p>\n<p>The correct answer is <strong>C<\/strong>.<\/p>\n<p>Bob is likely affected by loss aversion as a 50% chance to win $300 is worth $150, but he wasn\u2019t willing to wager $100.<\/p>\n<p>On the other hand, Bill is likely doing mental accounting because his previous losses are sunk costs and shouldn\u2019t motivate him to make bets with a negative expected value (a 50% chance to win $150 is only worth $75).<\/p>\n<p>Jane would have made a perfectly rational decision as she should be indifferent between the two options. By taking the sure $50, she may have acted out of risk aversion, which is often accounted for in standard financial models and not irrational behavior.<\/p>\n<\/blockquote>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vsw id=&#8221;7Ub4Gt-0nMs&#8221; source=&#8221;youtube&#8221; width=&#8221;611&#8243; height=&#8221;344&#8243; autoplay=&#8221;no&#8221;] Behavioral finance examines investor behavior to understand how people make decisions, individually and collectively. Behavioral finance does not assume that investors always act rationally but instead that people can be negatively affected by behavioral&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-1862","post","type-post","status-publish","format-standard","hentry","category-equity","blog-post","no-post-thumbnail","animate"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Behavioral Finance Concepts | CFA Level 1<\/title>\n<meta name=\"description\" content=\"Explore how psychological biases influence investor decisions and market outcomes in behavioral finance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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