public void test_zeroRatePointSensitivity() { ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE); double relativeYearFraction = ACT_365F.relativeYearFraction(DATE_VAL, DATE_AFTER); double df = test.discountFactor(DATE_AFTER); ZeroRateSensitivity expected = ZeroRateSensitivity.of(GBP, relativeYearFraction, -df * relativeYearFraction); assertEquals(test.zeroRatePointSensitivity(DATE_AFTER), expected); }
public 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.getSensitivities().get(0); assertEquals(sensi1.getCurrency(), GBP); }
public void test_zeroRatePointSensitivity_sensitivityCurrency() { ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE); double relativeYearFraction = ACT_365F.relativeYearFraction(DATE_VAL, DATE_AFTER); double df = test.discountFactor(DATE_AFTER); ZeroRateSensitivity expected = ZeroRateSensitivity.of(GBP, relativeYearFraction, USD, -df * relativeYearFraction); assertEquals(test.zeroRatePointSensitivity(DATE_AFTER, USD), expected); }
public void test_parameterSensitivity_full() { 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.getSensitivities().size(), 1); DoubleArray sensi0 = sensiObject.getSensitivities().get(0).getSensitivity(); 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).discountFactor(DATE_AFTER); 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).discountFactor(DATE_AFTER); assertEquals(sensi0.get(i), sensiValue * (dfP - dfM) / (2 * shift), TOLERANCE_DELTA_FD); } }