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from PlotMeTheGreeks by Yazann Romahi
VisualizationTool for Option Greeks in 3 and 4 dimensions.

lambda=bsElasticity(CallPutFlag, S,X,T,r,r_f, sigma)
function lambda=bsElasticity(CallPutFlag, S,X,T,r,r_f, sigma) 
    % Sensitivity in percent to a percent movement in the underlying asset
    % price
    
    lambda=bsDelta(CallPutFlag, S,X,T,r,r_f, sigma)*S./GKprice(CallPutFlag, S,X,T,r,r_f, sigma);
    
end

%   version: v1.0
%   author: Yazann Romahi [yazann@romahi.com]

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