Over the last decades passive investment products have continuously increased in importance. The efficiency of financial markets is often identified as the main reason for this development. We propose a theoretical framework which reverses the causality by showing that market efficiency might...

The existence of the pricing kernel is shown to imply the existence of an ambient information process that generates market filtration. This information process consists of a signal component concerning the value of the random variable X that might be interpreted as the timing of future cash...

We study the effect of country-specific noise on stock price comovement. Using a sample of dual-listed stocks, we show that the effect persists over time for some largest A-shares traded in China, but diminishes quickly for their H-shares traded in Hong Kong. We then examine whether the noise...

Based on criteria of mathematical simplicity and consistency with empirical market data, a stochastic volatility model is constructed, the volatility process being driven by fractional noise. Price return statistics and asymptotic behavior are derived from the model and compared with data....

In this paper, we provide evidence that the opening stock price contains noise on an everyday basis among all the NIFTY companies. However, we also find that the impact of noise does get eliminated from prices at the end of the trading day. We show how these seemingly contradictory twin...

This paper examines unique cultural features associated with the Japanese calendar known as rokuyo, which classifies days into six categories of varying levels of favorable/unfavorable sentiment days. Prior to the internationalization of Japanese financial markets in the early 1980s, rokuyo has...

We show in a simple framework that momentum trading can exist in equilibrium and momentum trading is profitable. Properties of the model fit the empirics well. First, the model captures in a parsimonious manner both short-term overreaction and long-term reversals. Second, it predicts that...

We document a robust positive relationship between the belief dispersion about macroeconomic conditions among household investors and the stock market trading volume, using more than 30 years of household survey data and a novel approach to measuring belief dispersions. Notably, such a...