public class spreadkR : ISecurityInputs, ISecurityReturns, ITwoSourcesHandler, IStreamHandler
	  {
	  	[HandlerParameter(true, "", NotOptimized = true)]
		 public double k1 { get; set; }
		 [HandlerParameter(true, "", NotOptimized = true)]
		double _k2;
	  	
		public double K2 {
			get { return _k2; }
			set { _k2 = value; }
		}