Cherian, J.A.; Perotti, E.C. - 1999
component. We show that both the time series and the term structure of conditional volatility in general is downward sloping and … reputation. Another testable implication is that in price series without a policy reversal, implied volatility from option prices … will exceed actual volatility. Over time, and in the absence of a reversal, this wedge progressively disappears. This may …