While the vast majority of the literature reports momentum profitability to be overwhelming in the U.S. market and widespread in other countries, this paper finds that the pure momentum strategy in general does not yield excess profitability in the Chinese stock markets. We find instead strong...

If transitory profitable trading opportunities exist, filter rules are used to mitigate transaction costs. We use a dynamic programming framework to design an optimal filter which maximizes after-cost expected returns. The filter size depends crucially on the degree of persistence of trading...

It is well documented that real exchange rates between the United States and many industrialized countries in the post- Bretton Woods period are integrated. This result implies that purchasing power parity (PPP) does not hold even as a long-run relationship. This paper demonstrates that the...

This paper examines the predictability of equity index returns for 18 developed countries. Based on the variance ratio test, the random walk hypothesis can be rejected at conventional significance levels for 11 countries with daily data and for 15 countries with weekly data. Monthly indices may...

Using a GARCH approach, we estimate a time-varying two-factor international asset pricing model for weekly equity index returns of 16 OECD countries. A trade-weighted basket of exchange rates and the MSCI world market index are used as risk factors. We find significant currency risk exposures in...

Can rational stochastic asset bubbles help explain the excess volatility of stock prices? The bubble considered here is treated as an unobserved state vector in the state-space model and is easily estimated using the Kalman filter. I find that the bubble components estimated account for a...

We derive the equilibrium asset expected returns when there is ambiguity in asset expected returns, as well as ambiguity in asset return variances. In our model, ambiguity risk is systematic in nature and is non-diversifiable. Under regularity conditions, expected asset returns are linearly...

We report evidence on the profitability and statistical significance among 2,127 technical trading rules. The best rules are found to be significantly profitable based on standard tests. We then employ White's (2000) Reality Check to evaluate these rules and find that data-snooping biases do not...

We systematically study the value of the information contained in closed-end fund (CEF) premiums. We parametrically estimate CEF expected returns as a function of the history of CEF premiums, in addition to the current premium, and buy the quintile of funds with the highest expected returns and...

This paper studies the impact of sovereign debt rating changes on liquidity for stocks from 40 countries for the period 1990-2009. We find that sovereign rating changes significantly affect stock liquidity. The impact is stronger for downgrades than for upgrades, and is nonlinear in event size....