Fractional return and fractional CAPM
The explanatory power of the capital assets pricing model (CAPM) is low because, it uses parsimonious modelling and differenced data. Overdifferenced asset prices show lower R2 values than the data with I(1) property (i.e. first difference of them give ADF-test-statistics near to the critical level). The CAPM of fractionally differenced series has a higher R2 than the traditional CAPM. Fractional return, or generalized return, is a long-run concept that is consistent with long-run CAPM. Various estimation methods, such as robust estimators, or alternative models, such as arbitrage pricing theory (APT), cannot handle the loss of information that occurs when data are transformed to the stationary series.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
Volume (Year): 4 (2008)
Issue (Month): 4 ()
|Contact details of provider:|| Web page: http://www.tandfonline.com/RAFL20|
|Order Information:||Web: http://www.tandfonline.com/pricing/journal/RAFL20|
When requesting a correction, please mention this item's handle: RePEc:taf:apfelt:v:4:y:2008:i:4:p:269-275. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Michael McNulty)
If references are entirely missing, you can add them using this form.