Co-movements of stock price uctuations are described by the cross-correlation matrix C. The application of random matrix theory (RMT) allows to distinguish between spurious correlations in C due to measurement noise and true correlations containing economically meaningful information. By calculating
Detecting correlation in stock market
✍ Scribed by Jörg D. Wichard; Christian Merkwirth; Maciej Ogorzałek
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 308 KB
- Volume
- 344
- Category
- Article
- ISSN
- 0378-4371
No coin nor oath required. For personal study only.
✦ Synopsis
We present a new method for detecting dependencies in the stock market. In order to find hidden correlations in the daily returns, we build cross prediction models and use the normalized modeling error as a generalized correlation measure that extends the concept of the classical correlation matrix.
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