Journal of Financial Economics
1974 1976 1977 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1993 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
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.

