The Handbook of Equity Market Anomalies

Download The Handbook of Equity Market Anomalies PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1118127765
Total Pages : 352 pages
Book Rating : 4.1/5 (181 download)

DOWNLOAD NOW!


Book Synopsis The Handbook of Equity Market Anomalies by : Leonard Zacks

Download or read book The Handbook of Equity Market Anomalies written by Leonard Zacks and published by John Wiley & Sons. This book was released on 2011-08-24 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investment pioneer Len Zacks presents the latest academic research on how to beat the market using equity anomalies The Handbook of Equity Market Anomalies organizes and summarizes research carried out by hundreds of finance and accounting professors over the last twenty years to identify and measure equity market inefficiencies and provides self-directed individual investors with a framework for incorporating the results of this research into their own investment processes. Edited by Len Zacks, CEO of Zacks Investment Research, and written by leading professors who have performed groundbreaking research on specific anomalies, this book succinctly summarizes the most important anomalies that savvy investors have used for decades to beat the market. Some of the anomalies addressed include the accrual anomaly, net stock anomalies, fundamental anomalies, estimate revisions, changes in and levels of broker recommendations, earnings-per-share surprises, insider trading, price momentum and technical analysis, value and size anomalies, and several seasonal anomalies. This reliable resource also provides insights on how to best use the various anomalies in both market neutral and in long investor portfolios. A treasure trove of investment research and wisdom, the book will save you literally thousands of hours by distilling the essence of twenty years of academic research into eleven clear chapters and providing the framework and conviction to develop market-beating strategies. Strips the academic jargon from the research and highlights the actual returns generated by the anomalies, and documented in the academic literature Provides a theoretical framework within which to understand the concepts of risk adjusted returns and market inefficiencies Anomalies are selected by Len Zacks, a pioneer in the field of investing As the founder of Zacks Investment Research, Len Zacks pioneered the concept of the earnings-per-share surprise in 1982 and developed the Zacks Rank, one of the first anomaly-based stock selection tools. Today, his firm manages U.S. equities for individual and institutional investors and provides investment software and investment data to all types of investors. Now, with his new book, he shows you what it takes to build a quant process to outperform an index based on academically documented market inefficiencies and anomalies.

Quantitative Equity Investing

Download Quantitative Equity Investing PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470262478
Total Pages : 528 pages
Book Rating : 4.4/5 (72 download)

DOWNLOAD NOW!


Book Synopsis Quantitative Equity Investing by : Frank J. Fabozzi

Download or read book Quantitative Equity Investing written by Frank J. Fabozzi and published by John Wiley & Sons. This book was released on 2010-03-01 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive look at the tools and techniques used in quantitative equity management Some books attempt to extend portfolio theory, but the real issue today relates to the practical implementation of the theory introduced by Harry Markowitz and others who followed. The purpose of this book is to close the implementation gap by presenting state-of-the art quantitative techniques and strategies for managing equity portfolios. Throughout these pages, Frank Fabozzi, Sergio Focardi, and Petter Kolm address the essential elements of this discipline, including financial model building, financial engineering, static and dynamic factor models, asset allocation, portfolio models, transaction costs, trading strategies, and much more. They also provide ample illustrations and thorough discussions of implementation issues facing those in the investment management business and include the necessary background material in probability, statistics, and econometrics to make the book self-contained. Written by a solid author team who has extensive financial experience in this area Presents state-of-the art quantitative strategies for managing equity portfolios Focuses on the implementation of quantitative equity asset management Outlines effective analysis, optimization methods, and risk models In today's financial environment, you have to have the skills to analyze, optimize and manage the risk of your quantitative equity investments. This guide offers you the best information available to achieve this goal.

Market Microstructure

Download Market Microstructure PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1119952786
Total Pages : 194 pages
Book Rating : 4.1/5 (199 download)

DOWNLOAD NOW!


Book Synopsis Market Microstructure by : Frédéric Abergel

Download or read book Market Microstructure written by Frédéric Abergel and published by John Wiley & Sons. This book was released on 2012-04-03 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest cutting-edge research on market microstructure Based on the December 2010 conference on market microstructure, organized with the help of the Institut Louis Bachelier, this guide brings together the leading thinkers to discuss this important field of modern finance. It provides readers with vital insight on the origin of the well-known anomalous "stylized facts" in financial prices series, namely heavy tails, volatility, and clustering, and illustrates their impact on the organization of markets, execution costs, price impact, organization liquidity in electronic markets, and other issues raised by high-frequency trading. World-class contributors cover topics including analysis of high-frequency data, statistics of high-frequency data, market impact, and optimal trading. This is a must-have guide for practitioners and academics in quantitative finance.

Earnings Quality

Download Earnings Quality PDF Online Free

Author :
Publisher : Research Foundation of the Institute of Chartered Financial Analysts
ISBN 13 : 9780943205687
Total Pages : 152 pages
Book Rating : 4.2/5 (56 download)

DOWNLOAD NOW!


Book Synopsis Earnings Quality by : Patricia M. Dechow

Download or read book Earnings Quality written by Patricia M. Dechow and published by Research Foundation of the Institute of Chartered Financial Analysts. This book was released on 2004-01-01 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Efficient Market Theory and Evidence

Download The Efficient Market Theory and Evidence PDF Online Free

Author :
Publisher : Now Publishers Inc
ISBN 13 : 1601984685
Total Pages : 99 pages
Book Rating : 4.6/5 (19 download)

DOWNLOAD NOW!


Book Synopsis The Efficient Market Theory and Evidence by : Andrew Ang

Download or read book The Efficient Market Theory and Evidence written by Andrew Ang and published by Now Publishers Inc. This book was released on 2011 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Efficient Market Hypothesis (EMH) asserts that, at all times, the price of a security reflects all available information about its fundamental value. The implication of the EMH for investors is that, to the extent that speculative trading is costly, speculation must be a loser's game. Hence, under the EMH, a passive strategy is bound eventually to beat a strategy that uses active management, where active management is characterized as trading that seeks to exploit mispriced assets relative to a risk-adjusted benchmark. The EMH has been refined over the past several decades to reflect the realism of the marketplace, including costly information, transactions costs, financing, agency costs, and other real-world frictions. The most recent expressions of the EMH thus allow a role for arbitrageurs in the market who may profit from their comparative advantages. These advantages may include specialized knowledge, lower trading costs, low management fees or agency costs, and a financing structure that allows the arbitrageur to undertake trades with long verification periods. The actions of these arbitrageurs cause liquid securities markets to be generally fairly efficient with respect to information, despite some notable anomalies.

Indian Stock Market

Download Indian Stock Market PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 8132215907
Total Pages : 135 pages
Book Rating : 4.1/5 (322 download)

DOWNLOAD NOW!


Book Synopsis Indian Stock Market by : Gourishankar S. Hiremath

Download or read book Indian Stock Market written by Gourishankar S. Hiremath and published by Springer Science & Business Media. This book was released on 2013-10-28 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: India is one of the major emerging economies of the world and has witnessed tremendous economic growth over the last decades. The reforms in the financial sector were introduced to infuse energy and vibrancy into the process of economic growth. The Indian stock market now has the largest number of listed companies in the world. The phenomenal growth of the Indian equity market and its growing importance in the economy is indicated by the extent of market capitalization and the increasing integration of the Indian economy with the global economy. Various schools of thought explain the behaviour of stock returns. The Efficient Market Theory is the most important theory of the School of Neoclassical Finance based on rational expectation and no-trade argument. The book investigates the growth and efficiency of the Indian stock market in the theoretical framework of the Efficiency Market Hypothesis (EMH). The main objective of the present study is to examine the returns behaviour in the Indian equity market in the changed market environment. A detailed and rigorous analysis, made with the help of the sophisticated time series econometric models, is one of the key elements of this volume. The analysis empirically tests the random walk hypothesis and focuses on issues like nonlinear dynamics, structural breaks and long memory. It uses new and disaggregated data on recent reforms and changes in the market microstructure. The data on various indices including sectoral indices help in measuring the relative efficiency of the market and understanding how liquidity and market capitalization affect the efficiency of the market.

Handbook Of Financial Econometrics, Mathematics, Statistics, And Machine Learning (In 4 Volumes)

Download Handbook Of Financial Econometrics, Mathematics, Statistics, And Machine Learning (In 4 Volumes) PDF Online Free

Author :
Publisher : World Scientific
ISBN 13 : 9811202400
Total Pages : 5053 pages
Book Rating : 4.8/5 (112 download)

DOWNLOAD NOW!


Book Synopsis Handbook Of Financial Econometrics, Mathematics, Statistics, And Machine Learning (In 4 Volumes) by : Cheng Few Lee

Download or read book Handbook Of Financial Econometrics, Mathematics, Statistics, And Machine Learning (In 4 Volumes) written by Cheng Few Lee and published by World Scientific. This book was released on 2020-07-30 with total page 5053 pages. Available in PDF, EPUB and Kindle. Book excerpt: This four-volume handbook covers important concepts and tools used in the fields of financial econometrics, mathematics, statistics, and machine learning. Econometric methods have been applied in asset pricing, corporate finance, international finance, options and futures, risk management, and in stress testing for financial institutions. This handbook discusses a variety of econometric methods, including single equation multiple regression, simultaneous equation regression, and panel data analysis, among others. It also covers statistical distributions, such as the binomial and log normal distributions, in light of their applications to portfolio theory and asset management in addition to their use in research regarding options and futures contracts.In both theory and methodology, we need to rely upon mathematics, which includes linear algebra, geometry, differential equations, Stochastic differential equation (Ito calculus), optimization, constrained optimization, and others. These forms of mathematics have been used to derive capital market line, security market line (capital asset pricing model), option pricing model, portfolio analysis, and others.In recent times, an increased importance has been given to computer technology in financial research. Different computer languages and programming techniques are important tools for empirical research in finance. Hence, simulation, machine learning, big data, and financial payments are explored in this handbook.Led by Distinguished Professor Cheng Few Lee from Rutgers University, this multi-volume work integrates theoretical, methodological, and practical issues based on his years of academic and industry experience.

Alphanomics

Download Alphanomics PDF Online Free

Author :
Publisher : Now Publishers
ISBN 13 : 9781601988928
Total Pages : 212 pages
Book Rating : 4.9/5 (889 download)

DOWNLOAD NOW!


Book Synopsis Alphanomics by : Charles Lee

Download or read book Alphanomics written by Charles Lee and published by Now Publishers. This book was released on 2015-12-16 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alphanomics: The Informational Underpinnings of Market Efficiency is intended to be a compact introduction to academic research on market efficiency, behavioral finance, and fundamental analysis and is dedicated to the kind of decision-driven and prospectively-focused research that is much needed in a market constantly seeking to become more efficient. The authors refer to this type of research as Alphanomics, the informational economics behind market efficiency. Alpha refers to the abnormal returns, which provide the incentive for some subpopulation of investors to engage in information acquisition and costly arbitrage activities. Nomics refers to the economics of alpha extraction, which encompasses the costs and incentives of informational arbitrage as a sustainable business proposition. Some of the questions that are addressed include: why do we believe markets are efficient?; what problems have this belief engendered?; what factors can impede and/or facilitate market efficiency?; what roles do investor sentiment and costly arbitrage play in determining an equilibrium level of informational efficiency?; what is the essence of value investing?; how is it related to fundamental analysis (the study of historical financial data)?; and how might we distinguish between risk and mispricing based explanations for predictability patterns in returns? The first two sections review the evolution of academic thinking on market efficiency and introduce the noise trader model as a rational alternative. Section 3 surveys the literature on investor sentiment and its role as a source of both risks and returns. Section 4 discusses the role of fundamental analysis in value investing. Section 5 reviews the literature on limits to arbitrage, and section 6 discusses research methodology issues associated with the need to distinguish mispricing from risk.

Inefficient Markets

Download Inefficient Markets PDF Online Free

Author :
Publisher : OUP Oxford
ISBN 13 : 0191606898
Total Pages : 308 pages
Book Rating : 4.1/5 (916 download)

DOWNLOAD NOW!


Book Synopsis Inefficient Markets by : Andrei Shleifer

Download or read book Inefficient Markets written by Andrei Shleifer and published by OUP Oxford. This book was released on 2000-03-09 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The efficient markets hypothesis has been the central proposition in finance for nearly thirty years. It states that securities prices in financial markets must equal fundamental values, either because all investors are rational or because arbitrage eliminates pricing anomalies. This book describes an alternative approach to the study of financial markets: behavioral finance. This approach starts with an observation that the assumptions of investor rationality and perfect arbitrage are overwhelmingly contradicted by both psychological and institutional evidence. In actual financial markets, less than fully rational investors trade against arbitrageurs whose resources are limited by risk aversion, short horizons, and agency problems. The book presents and empirically evaluates models of such inefficient markets. Behavioral finance models both explain the available financial data better than does the efficient markets hypothesis and generate new empirical predictions. These models can account for such anomalies as the superior performance of value stocks, the closed end fund puzzle, the high returns on stocks included in market indices, the persistence of stock price bubbles, and even the collapse of several well-known hedge funds in 1998. By summarizing and expanding the research in behavioral finance, the book builds a new theoretical and empirical foundation for the economic analysis of real-world markets.

Efficiency and Anomalies in Stock Markets

Download Efficiency and Anomalies in Stock Markets PDF Online Free

Author :
Publisher : Mdpi AG
ISBN 13 : 9783036530802
Total Pages : 232 pages
Book Rating : 4.5/5 (38 download)

DOWNLOAD NOW!


Book Synopsis Efficiency and Anomalies in Stock Markets by : Wing-Keung Wong

Download or read book Efficiency and Anomalies in Stock Markets written by Wing-Keung Wong and published by Mdpi AG. This book was released on 2022-02-17 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Efficient Market Hypothesis believes that it is impossible for an investor to outperform the market because all available information is already built into stock prices. However, some anomalies could persist in stock markets while some other anomalies could appear, disappear and re-appear again without any warning. A Special Issue on "Efficiency and Anomalies in Stock Markets" will be devoted to advancements in the theoretical development of market efficiency and anomaly in the Stock Market, as well as applications in Stock Market efficiency and anomalies.

Handbook of Corporate Finance

Download Handbook of Corporate Finance PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0080488919
Total Pages : 559 pages
Book Rating : 4.0/5 (84 download)

DOWNLOAD NOW!


Book Synopsis Handbook of Corporate Finance by : Bjørn Espen Eckbo

Download or read book Handbook of Corporate Finance written by Bjørn Espen Eckbo and published by Elsevier. This book was released on 2007-05-21 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: Judging by the sheer number of papers reviewed in this Handbook, the empirical analysis of firms' financing and investment decisions—empirical corporate finance—has become a dominant field in financial economics. The growing interest in everything "corporate is fueled by a healthy combination of fundamental theoretical developments and recent widespread access to large transactional data bases. A less scientific—but nevertheless important—source of inspiration is a growing awareness of the important social implications of corporate behavior and governance. This Handbook takes stock of the main empirical findings to date across an unprecedented spectrum of corporate finance issues, ranging from econometric methodology, to raising capital and capital structure choice, and to managerial incentives and corporate investment behavior. The surveys are written by leading empirical researchers that remain active in their respective areas of interest. With few exceptions, the writing style makes the chapters accessible to industry practitioners. For doctoral students and seasoned academics, the surveys offer dense roadmaps into the empirical research landscape and provide suggestions for future work.*The Handbooks in Finance series offers a broad group of outstanding volumes in various areas of finance*Each individual volume in the series should present an accurate self-contained survey of a sub-field of finance*The series is international in scope with contributions from field leaders the world over

Exchange Rates and Corporate Performance

Download Exchange Rates and Corporate Performance PDF Online Free

Author :
Publisher : Beard Books
ISBN 13 : 9781587981593
Total Pages : 268 pages
Book Rating : 4.9/5 (815 download)

DOWNLOAD NOW!


Book Synopsis Exchange Rates and Corporate Performance by : Yakov Amihud

Download or read book Exchange Rates and Corporate Performance written by Yakov Amihud and published by Beard Books. This book was released on 2003 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a reprint of a previously published book. It consists of a series of papers by experts in the field on how the exchange rate volatility of the 1980s affected the financial policies of international firms.

Advances in Behavioral Finance

Download Advances in Behavioral Finance PDF Online Free

Author :
Publisher : Russell Sage Foundation
ISBN 13 : 9780871548443
Total Pages : 628 pages
Book Rating : 4.5/5 (484 download)

DOWNLOAD NOW!


Book Synopsis Advances in Behavioral Finance by : Richard H. Thaler

Download or read book Advances in Behavioral Finance written by Richard H. Thaler and published by Russell Sage Foundation. This book was released on 1993-08-19 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern financial markets offer the real world's best approximation to the idealized price auction market envisioned in economic theory. Nevertheless, as the increasingly exquisite and detailed financial data demonstrate, financial markets often fail to behave as they should if trading were truly dominated by the fully rational investors that populate financial theories. These markets anomalies have spawned a new approach to finance, one which as editor Richard Thaler puts it, "entertains the possibility that some agents in the economy behave less than fully rationally some of the time." Advances in Behavioral Finance collects together twenty-one recent articles that illustrate the power of this approach. These papers demonstrate how specific departures from fully rational decision making by individual market agents can provide explanations of otherwise puzzling market phenomena. To take several examples, Werner De Bondt and Thaler find an explanation for superior price performance of firms with poor recent earnings histories in the tendencies of investors to overreact to recent information. Richard Roll traces the negative effects of corporate takeovers on the stock prices of the acquiring firms to the overconfidence of managers, who fail to recognize the contributions of chance to their past successes. Andrei Shleifer and Robert Vishny show how the difficulty of establishing a reliable reputation for correctly assessing the value of long term capital projects can lead investment analysis, and hence corporate managers, to focus myopically on short term returns. As a testing ground for assessing the empirical accuracy of behavioral theories, the successful studies in this landmark collection reach beyond the world of finance to suggest, very powerfully, the importance of pursuing behavioral approaches to other areas of economic life. Advances in Behavioral Finance is a solid beachhead for behavioral work in the financial arena and a clear promise of wider application for behavioral economics in the future.

Ownership Structure, Related Party Transactions, and Firm Valuation

Download Ownership Structure, Related Party Transactions, and Firm Valuation PDF Online Free

Author :
Publisher : Cambridge University Press
ISBN 13 : 1108624863
Total Pages : 194 pages
Book Rating : 4.1/5 (86 download)

DOWNLOAD NOW!


Book Synopsis Ownership Structure, Related Party Transactions, and Firm Valuation by : Amrinder Khosa

Download or read book Ownership Structure, Related Party Transactions, and Firm Valuation written by Amrinder Khosa and published by Cambridge University Press. This book was released on 2019-03-21 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concentrated ownership is considered to be the best protection for shareholders in economies where legal protection is relatively weak. This book investigates and concludes, for Indian business groups, that concentrated-inside ownership provides opportunities for the expropriation of minority shareholders. While more concentrated direct ownership of controlling families results in a higher market value of equity, indirect ownership obtained through cross-holding provides incentives to extract private benefits and results in value loss. This finding requires the prompt attention of regulatory bodies, outside investors and other interested parties. This book examines the effect of ownership structure and disclosure of related-party transactions on firm valuation of group-affiliated firms in India, by using a sample of 317 listed firms comprising 1350 firm-year observations from 2008 to 2017. Well-accepted value-relevance models are employed to examine the effect of ownership rights on market value of equity and valuation effect of RP trading, asset transfer, investment and loan transactions.

Stochastic Frontier Analysis

Download Stochastic Frontier Analysis PDF Online Free

Author :
Publisher : Cambridge University Press
ISBN 13 : 1107717302
Total Pages : 348 pages
Book Rating : 4.1/5 (77 download)

DOWNLOAD NOW!


Book Synopsis Stochastic Frontier Analysis by : Subal C. Kumbhakar

Download or read book Stochastic Frontier Analysis written by Subal C. Kumbhakar and published by Cambridge University Press. This book was released on 2003-03-10 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern textbook presentations of production economics typically treat producers as successful optimizers. Conventional econometric practice has generally followed this paradigm, and least squares based regression techniques have been used to estimate production, cost, profit and other functions. In such a framework deviations from maximum output, from minimum cost and cost minimizing input demands, and from maximum profit and profit maximizing output supplies and input demands, are attributed exclusively to random statistical noise. However casual empiricism and the business press both make persuasive cases for the argument that, although producers may indeed attempt to optimize, they do not always succeed. This book develops econometric techniques for the estimation of production, cost and profit frontiers, and for the estimation of the technical and economic efficiency with which producers approach these frontiers. Since these frontiers envelop rather than intersect the data, and since the authors continue to maintain the traditional econometric belief in the presence of external forces contributing to random statistical noise, the work is titled Stochastic Frontier Analysis.

Handbook of the Economics of Finance

Download Handbook of the Economics of Finance PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 9780444513632
Total Pages : 698 pages
Book Rating : 4.5/5 (136 download)

DOWNLOAD NOW!


Book Synopsis Handbook of the Economics of Finance by : G. Constantinides

Download or read book Handbook of the Economics of Finance written by G. Constantinides and published by Elsevier. This book was released on 2003-11-04 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arbitrage, State Prices and Portfolio Theory / Philip h. Dybvig and Stephen a. Ross / - Intertemporal Asset Pricing Theory / Darrell Duffle / - Tests of Multifactor Pricing Models, Volatility Bounds and Portfolio Performance / Wayne E. Ferson / - Consumption-Based Asset Pricing / John y Campbell / - The Equity Premium in Retrospect / Rainish Mehra and Edward c. Prescott / - Anomalies and Market Efficiency / William Schwert / - Are Financial Assets Priced Locally or Globally? / G. Andrew Karolyi and Rene M. Stuli / - Microstructure and Asset Pricing / David Easley and Maureen O'hara / - A Survey of Behavioral Finance / Nicholas Barberis and Richard Thaler / - Derivatives / Robert E. Whaley / - Fixed-Income Pricing / Qiang Dai and Kenneth J. Singleton.

Bubbles and Crashes in Experimental Asset Markets

Download Bubbles and Crashes in Experimental Asset Markets PDF Online Free

Author :
Publisher : Springer
ISBN 13 : 9783642021466
Total Pages : 171 pages
Book Rating : 4.0/5 (214 download)

DOWNLOAD NOW!


Book Synopsis Bubbles and Crashes in Experimental Asset Markets by : Stefan Palan

Download or read book Bubbles and Crashes in Experimental Asset Markets written by Stefan Palan and published by Springer. This book was released on 2010-02-04 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes a laboratory experiment designed to test the causes and properties of bubbles in financial markets and explores the question whether it is possible to design markets which avoid such bubbles and crashes. In the experiment, subjects were given the opportunity to trade in a stock market modeled after the seminal work of Smith et al. (1988). To account for the increasing importance of online betting sites, subjects were also allowed to trade in a digital option market. The outcomes shed new light on how subjects form and update their expectations, placing special emphasis on the bounded rationality of investors. Various analytical bubble measures found in the literature are collected, calculated, classified and presented for the first time. The very interesting new bubble measures "Dispersion Ratio", "Overpriced Transactions" and "Underpriced Transactions" are developed, making the book an important step towards the research goal of preventing bubbles and crashes in financial markets.