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The Determinants of Implied Volatility: A Test Using LIFFE Option Prices
Author(s) -
Copeland L.,
Poon S. H.,
Stapleton R. C.
Publication year - 2000
Publication title -
journal of business finance and accounting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.282
H-Index - 77
eISSN - 1468-5957
pISSN - 0306-686X
DOI - 10.1111/1468-5957.00337
Subject(s) - economics , volatility swap , volatility smile , volatility (finance) , implied volatility , econometrics , financial economics , forward volatility , monetary economics , volatility risk premium , variance swap
This paper presents and tests a model of the volatility of individual companies’ stocks, using implied volatilities derived from option prices. The data comes from traded options quoted on the London International Financial Futures Exchange. The model relates equity volatilities to corporate earnings announcements, interest‐rate volatility and to four determining variables representing leverage, the degree of fixed‐rate debt, asset duration and cash flow inflation indexation. The model predicts that equity volatility is positively related to duration and leverage and negatively related to the degree of inflation indexation and the proportion of fixed‐rate debt in the capital structure. Empirical results suggest that duration, the proportion of fixed‐rate debt, and leverage are significantly related to implied volatility. Regressions using all four determining variables explain approximately 30% of the cross‐sectional variation in volatility. Time series tests confirm an expected drop in volatility shortly after the earnings announcement and in most cases a positive relationship between the volatility of the stock and the volatility of interest rates.