Für Investitionen am Kapitalmarkt spielt die Portfoliotheorie (Markowitz, 1952) eine bedeutende Rolle und bildet nach wie vor eine wichtige Entscheidungsgrundlage für die Strukturierung von Anlageportfolios. Für risikoaverse Anleger ist die Diversifikation der Portfoliobestandteile eine...

Hohe und weiter steigende Bewertungsniveaus an Aktien- oder Immobilienmärkten werden von Beobachtern aus Wirtschaft, Politik, Medien und der akademischen Welt oft als Vermögenspreisinflation ("Asset Inflation") bezeichnet und als ein wirtschaftspolitisches Problem interpretiert, zu dessen...

Diese Arbeit wurde mit dem Hochschulpreis des Deutschen Aktieninstituts (1. Preis) ausgezeichnet. Die Jury würdigte besonders die hohe Praxisrelevanz der Arbeit sowie die ausführlichen statistischen Analysen. Seit 1998 können deutsche Aktiengesellschaften den Erwerb eigener Aktien als...

The Great Financial Crisis of 2007-09 confirmed the vital importance of advancing our understanding of macrofinancial linkages, the two-way interactions between the real economy and the financial sector. The crisis was a bitter reminder of how sharp fluctuations in asset prices, credit and...

Macroeconomic news announcements are elaborate and multi-dimensional. We consider a framework in which jumps in asset prices around macroeconomic news and monetary policy announcements reflect both the response to observed surprises in headline numbers and latent factors, reflecting other...

Manipulative communications touting stocks are common in capital markets around the world. Although the price distortions created by so-called "pump-and-dump" schemes are well known, little is known about the investors in these frauds. By examining 421 "pump-and-dump" schemes between 2002 and...

From 1963 through 2015, idiosyncratic risk (IR) is high when market risk (MR) is high. We show that the positive relation between IR and MR is highly stable through time and is robust across exchanges, firm size, liquidity, and market-to-book groupings. Though stock liquidity affects the...

This study was conducted to investigate the market anomalies in the Borsa Istanbul Index (BIST). The scope of this study is to examine the Monday effects in BIST that are stock index of Turkey with an data set that contains daily stock prices between 02.01.2010 and 22.10.2014. The stock returns...

The stock market has always been an attractive area for researchers since no method has been found yet to predict the stock price behavior precisely. Due to its high rate of uncertainty and volatility, it carries a higher risk than any other investment area, thus the stock price behavior is...