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On Portfolio Optimization : Forecasting Covariances and Choosing the Risk Model

Chan, Louis K.C. - 1999

We evaluate the performance of different models for the covariance structure of stock returns, focusing on their use for optimal portfolio selection. Comparisons are based on forecasts of future covariances as well as the out-of-sample volatility of optimized portfolios from each model. A few...

Persistent link: https://www.econbiz.de/10012471761

Do Institutional Investors Destabilize Stock Prices? Evidence on Herding and Feedback Trading

Lakonishok, Josef - 1991

evaluate the potential effect of their trading on stock prices. We address two aspects of trading by money managers: herding …, which refers to buying (selling) the same stocks as other managers buy (sell) at the same time; and positive … of substantial herding or positive-feedback trading by pension fund managers, except in small stocks. Also, there is no …

Persistent link: https://www.econbiz.de/10012475147

High Idiosyncratic Volatility and Low Returns : International and Further U.S. Evidence

Ang, Andrew - 2008

Stocks with recent past high idiosyncratic volatility have low future average returns around the world. Across 23 developed markets, the difference in average returns between the extreme quintile portfolios sorted on idiosyncratic volatility is -1.31% per month, after controlling for world...

Persistent link: https://www.econbiz.de/10012464908

Risk, Return and Dividends

Ang, Andrew - 2007

We characterize the joint dynamics of dividends, expected returns, stochastic volatility, and prices. In particular, with a given dividend process, one of the processes of the expected return, the stock volatility, or the price-dividend ratio fully determines the other two. For example, together...

Persistent link: https://www.econbiz.de/10012465813

The Cross-Section of Volatility and Expected Returns

Ang, Andrew - 2004

We examine the pricing of aggregate volatility risk in the cross-section of stock returns. Consistent with theory, we find that stocks with high sensitivities to innovations in aggregate volatility have low average returns. In addition, we find that stocks with high idiosyncratic volatility...

Persistent link: https://www.econbiz.de/10012467837