Hi,
if it's still of any interest (my bad, I lost track of the post)
the requirement is because it makes no sense to quote a volatility for
an option maturity in the past.
Luigi
On Fri, Feb 15, 2013 at 4:50 AM, xnb <
[hidden email]> wrote:
> I wonder why the settlementDate must be smaller than the vector of Dates in
> BlackVarianceSurface.
> *QL_REQUIRE(dates[0]>=referenceDate, "cannot have dates[0] <=
> referenceDate");*
> What model can be used to interpolate a volatility value ?
>
>
> test-suite\barrieroption.cpp
> ql\termstructures\volatility\equityfx\blackvariancesurface.cpp
>
> regards,
> XNB
>
>
>
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