We investigate the importance of the assumed covariance structure for longitudinal modelling of CD4 counts. We examine how individual predictions of future CD4 counts are affected by the covariance structure. We consider four covariance structures: one based on an integrated Ornstein-Uhlenbeck stoch
Futures hedging using dynamic models of the variance/covariance structure
โ Scribed by Ponladesh Poomimars; John Cadle; Michael Theobald
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 231 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0270-7314
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
Dynamic futuresโhedging ratios are estimated across seven markets using generalized models of the
variance/covariance structure. The hedging performances of the resultant dynamic strategies are then compared
with static and naรฏve strategies, both inโ and outโofโsample. Bayesianโadjusted
hedge ratios also are employed as error purgers. The empirical results indicate that the
generalized dynamic models are well specified and that their use in determining optimal hedge ratios can lead to
improvements in hedging performance as measured by the volatilities of the returns on the optimally hedged
position. ยฉ 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:241โ260, 2003
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