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Systematic Risk and Revenue Volatility
Author(s) -
Griffin Harry F.,
Dugan Michael T.
Publication year - 2003
Publication title -
journal of financial research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.319
H-Index - 49
eISSN - 1475-6803
pISSN - 0270-2592
DOI - 10.1111/1475-6803.00053
Subject(s) - volatility (finance) , portfolio , explanatory power , economics , econometrics , leverage (statistics) , systematic risk , bond , financial economics , monetary economics , finance , mathematics , statistics , philosophy , epistemology
Abstract We introduce the degree of economic leverage (DEL) as an extension of the existing method of decomposing beta and assess its incremental explanatory power through empirical testing. The DEL is defined as the percentage change in the firm's sales resulting from a unit percentage change attributable to an exogenous economic disturbance. The exogenous economic disturbance employed is the ratio of long‐term T‐bond rates to short‐term T‐bill rates. The evidence supports the DEL's role in explaining systematic risk at both the industry and portfolio levels. However, we find mixed results at the firm level.