Covariance Stationarity of International Equity Markets Returns: Recent Evidence

Mahmoud Wahab and Malek Lashgari

The Financial Review, 1993, vol. 28, issue 2, 239-60

Abstract: Intertemporal stationarity tests of the variance-covariance matrix of monthly returns on seven international equity indices are conducted over the most recent period. Pairwise covariances are then decomposed into their component statistics for further examination of the source(s) of stationarity or nonstationarity. Historical analysis reveals that pairwise covariances were invariably highly nonstationary over forecast intervals that varied in length between one month and five years. Reliance on historical covariances to estimate future covariances over a hold-out sample produced suboptimal results in comparison to an alternative naive forecasting model. These findings were robust in that they were invariant to whether nominal or real returns were used. Evidence on the intertemporal stationarity of the vector of mean returns is also provided. Copyright 1993 by MIT Press.

Date: 1993
References: Add references at CitEc
Citations: View citations in EconPapers (8)

There are no downloads for this item, see the EconPapers FAQ for hints about obtaining it.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:bla:finrev:v:28:y:1993:i:2:p:239-60

Ordering information: This journal article can be ordered from
http://www.blackwell ... bs.asp?ref=0732-8516

Access Statistics for this article

The Financial Review is currently edited by Cynthia J. Campbell and Arnold R. Cowan

More articles in The Financial Review from Eastern Finance Association Contact information at EDIRC.
Bibliographic data for series maintained by Wiley Content Delivery ().