public virtual void test_parameterSensitivity_withSpread_full()
{
int periodPerYear = 2;
double spread = 0.0011; // 11 bp
ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE);
double sensiValue = 25d;
ZeroRateSensitivity point = test.zeroRatePointSensitivityWithSpread(DATE_AFTER, spread, PERIODIC, periodPerYear);
point = point.multipliedBy(sensiValue);
CurrencyParameterSensitivities sensiObject = test.parameterSensitivity(point);
assertEquals(sensiObject.Sensitivities.size(), 1);
DoubleArray sensi0 = sensiObject.Sensitivities.get(0).Sensitivity;
double shift = 1.0E-6;
for (int i = 0; i < X.size(); i++)
{
DoubleArray yP = Y.with(i, Y.get(i) + shift);
InterpolatedNodalCurve curveP = InterpolatedNodalCurve.of(META_ZERO_PERIODIC, X, yP, INTERPOLATOR);
double dfP = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, curveP).discountFactorWithSpread(DATE_AFTER, spread, PERIODIC, periodPerYear);
DoubleArray yM = Y.with(i, Y.get(i) - shift);
InterpolatedNodalCurve curveM = InterpolatedNodalCurve.of(META_ZERO_PERIODIC, X, yM, INTERPOLATOR);
double dfM = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, curveM).discountFactorWithSpread(DATE_AFTER, spread, PERIODIC, periodPerYear);
assertEquals(sensi0.get(i), sensiValue * (dfP - dfM) / (2 * shift), TOLERANCE_DELTA_FD, "With spread - " + i);
}
}
//-------------------------------------------------------------------------
public virtual void test_multipliedBy()
{
ZeroRateSensitivity @base = ZeroRateSensitivity.of(GBP, YEARFRAC, 32d);
ZeroRateSensitivity expected = ZeroRateSensitivity.of(GBP, YEARFRAC, 32d * 3.5d);
ZeroRateSensitivity test = @base.multipliedBy(3.5d);
assertEquals(test, expected);
}
/// <summary>
/// Compute the present value curve sensitivity of the payment with z-spread.
/// <para>
/// The present value sensitivity of the payment is the sensitivity of the
/// present value to the discount factor curve.
/// There is no sensitivity if the payment date is before the valuation date.
/// </para>
/// <para>
/// The specified discount factors should be for the payment currency, however this is not validated.
/// </para>
/// <para>
/// The z-spread is a parallel shift applied to continuously compounded rates or periodic
/// compounded rates of the discounting curve.
///
/// </para>
/// </summary>
/// <param name="payment"> the payment </param>
/// <param name="discountFactors"> the discount factors to price against </param>
/// <param name="zSpread"> the z-spread </param>
/// <param name="compoundedRateType"> the compounded rate type </param>
/// <param name="periodsPerYear"> the number of periods per year </param>
/// <returns> the point sensitivity of the present value </returns>
public virtual PointSensitivityBuilder presentValueSensitivityWithSpread(Payment payment, DiscountFactors discountFactors, double zSpread, CompoundedRateType compoundedRateType, int periodsPerYear)
{
if (discountFactors.ValuationDate.isAfter(payment.Date))
{
return(PointSensitivityBuilder.none());
}
ZeroRateSensitivity sensi = discountFactors.zeroRatePointSensitivityWithSpread(payment.Date, zSpread, compoundedRateType, periodsPerYear);
return(sensi.multipliedBy(payment.Amount));
}
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
public virtual void test_parameterSensitivity()
{
ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE);
double sensiValue = 25d;
ZeroRateSensitivity point = test.zeroRatePointSensitivity(DATE_AFTER);
point = point.multipliedBy(sensiValue);
CurrencyParameterSensitivities sensiObject = test.parameterSensitivity(point);
assertEquals(sensiObject.size(), 1);
CurrencyParameterSensitivity sensi1 = sensiObject.Sensitivities.get(0);
assertEquals(sensi1.Currency, GBP);
}