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Journal of Financial Economics

Опубликовано на портале: 25-10-2007
Timothy S. Mech Journal of Financial Economics. 1993.  Vol. 34. No. 3. P. 307-334. 
This paper investigates whether portfolio return autocorrelation can be explained by time-varying expected returns, nontrading, stale limit orders, market maker inventory policy, or transaction costs. Evidence is consistent with the hypothesis that transaction costs cause portfolio autocorrelation by slowing price adjustment. I develop a transaction-cost model which predicts that prices adjust faster when changes in valuation are large in relation to the bid-ask spread. Cross-sectional tests support this prediction, but time-series tests do not.
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Опубликовано на портале: 25-10-2007
Kenneth R. French, Richard Roll Journal of Financial Economics. 1986.  Vol. 17. No. 1. P. 5-26. 
Asset prices are much more volatile during exchange trading hours than during non-trading hours. This paper considers three explanations for this phenomenon: (1) volatility is caused by public information which is more likely to arrive during normal business hours; (2) volatility is caused by private information which affects prices when informed investors trade; and (3) volatility is caused by pricing errors that occur during trading. Although a significant fraction of the daily variance is caused by mispricing, the behavior of returns around exchange holidays suggests that private information is the principle factor behind high trading-time variances.
ресурс содержит полный текст, либо отрывок из него