Stock exchange

About: Stock exchange is a research topic. Over the lifetime, 39566 publications have been published within this topic receiving 612044 citations.

Does Greater Firm-Specific Return Variation Mean More or Less Informed Stock Pricing?

Abstract: Roll (1988) observes low R2 statistics for common asset pricing models due to vigorousfirms-specific returns variation not associated with public information. He concludes (p. 56) that this implies â¬Seither private information or else occasional frenzy unrelated to concrete information.â¬?We show that firms and industries with lower market model R2 statistics exhibit higher association between current returns and future earnings, indicating more information about future earnings in current stock returns. This supports Rollâ¬"s first interpretation ⬠higher firms-specific returns variation as a fraction of total variation signals more information-laden stock prices and, therefore, more efficient stock markets.

Why Stock Markets Crash: Critical Events in Complex Financial Systems

Abstract: The scientific study of complex systems has transformed a wide range of disciplines in recent years, enabling researchers in both the natural and social sciences to model and predict phenomena as diverse as earthquakes, global warming, demographic patterns, financial crises, and the failure of materials. In this book, Didier Sornette boldly applies his varied experience in these areas to propose a simple, powerful, and general theory of how, why, and when stock markets crash. Most attempts to explain market failures seek to pinpoint triggering mechanisms that occur hours, days, or weeks before the collapse. Sornette proposes a radically different view: the underlying cause can be sought months and even years before the abrupt, catastrophic event in the build-up of cooperative speculation, which often translates into an accelerating rise of the market price, otherwise known as a "bubble." Anchoring his sophisticated, step-by-step analysis in leading-edge physical and statistical modeling techniques, he unearths remarkable insights and some predictions--among them, that the "end of the growth era" will occur around 2050. Sornette probes major historical precedents, from the decades-long "tulip mania" in the Netherlands that wilted suddenly in 1637 to the South Sea Bubble that ended with the first huge market crash in England in 1720, to the Great Crash of October 1929 and Black Monday in 1987, to cite just a few. He concludes that most explanations other than cooperative self-organization fail to account for the subtle bubbles by which the markets lay the groundwork for catastrophe. Any investor or investment professional who seeks a genuine understanding of looming financial disasters should read this book. Physicists, geologists, biologists, economists, and others will welcome Why Stock Markets Crash as a highly original "scientific tale," as Sornette aptly puts it, of the exciting and sometimes fearsome--but no longer quite so unfathomable--world of stock markets.

Voluntary Corporate Disclosure by Swedish Companies

Abstract: Sweden is of interest because of the rapid growth in the Stockholm Stock Exchange and because of the country's disproportionate number of multi-national enterprises. This paper reports on the extent of voluntary disclosure in the corporate annual reports of unlisted and listed Swedish companies. A wide-ranging definition of voluntary disclosure is adopted because of the flexibility of approach accepted in Sweden. This should not be construed that Swedish accounting is largely unregulated, rather it reflects a problem of interpretation of what constitutes generally accepted accounting principles in Sweden. In addition, the paper assesses whether there is a significant association between a number of independent variables and the extent of disclosure.