public virtual void pointAndParameterFx()
{
ImmutableRatesProvider test = ImmutableRatesProvider.builder(VAL_DATE).fxRateProvider(FX_MATRIX).discountCurve(GBP, DISCOUNT_CURVE_GBP).discountCurve(USD, DISCOUNT_CURVE_USD).build();
ImmutableRatesProvider test_gbp_up = ImmutableRatesProvider.builder(VAL_DATE).fxRateProvider(FX_MATRIX).discountCurve(GBP, DISCOUNT_CURVE_GBP_UP).discountCurve(USD, DISCOUNT_CURVE_USD).build();
ImmutableRatesProvider test_gbp_dw = ImmutableRatesProvider.builder(VAL_DATE).fxRateProvider(FX_MATRIX).discountCurve(GBP, DISCOUNT_CURVE_GBP_DOWN).discountCurve(USD, DISCOUNT_CURVE_USD).build();
ImmutableRatesProvider test_usd_up = ImmutableRatesProvider.builder(VAL_DATE).fxRateProvider(FX_MATRIX).discountCurve(GBP, DISCOUNT_CURVE_GBP).discountCurve(USD, DISCOUNT_CURVE_USD_UP).build();
ImmutableRatesProvider test_usd_dw = ImmutableRatesProvider.builder(VAL_DATE).fxRateProvider(FX_MATRIX).discountCurve(GBP, DISCOUNT_CURVE_GBP).discountCurve(USD, DISCOUNT_CURVE_USD_DOWN).build();
LocalDate matuirtyDate = GBP_USD_WM.calculateMaturityFromFixing(VAL_DATE, REF_DATA);
double maturityTime = DAY_COUNT.relativeYearFraction(VAL_DATE, matuirtyDate);
// GBP based
FxIndexObservation obs = FxIndexObservation.of(GBP_USD_WM, VAL_DATE, REF_DATA);
PointSensitivityBuilder sensiBuildCmpGBP = test.fxIndexRates(GBP_USD_WM).ratePointSensitivity(obs, GBP);
FxIndexSensitivity sensiBuildExpGBP = FxIndexSensitivity.of(obs, GBP, USD, 1.0);
assertTrue(sensiBuildCmpGBP.Equals(sensiBuildExpGBP));
double sense_gbp1 = 0.5 * (test_gbp_up.fxIndexRates(GBP_USD_WM).rate(obs, GBP) - test_gbp_dw.fxIndexRates(GBP_USD_WM).rate(obs, GBP)) / EPS_FD * (-maturityTime * GBP_DSC);
double sense_usd1 = 0.5 * (test_usd_up.fxIndexRates(GBP_USD_WM).rate(obs, GBP) - test_usd_dw.fxIndexRates(GBP_USD_WM).rate(obs, GBP)) / EPS_FD * (-maturityTime * USD_DSC);
PointSensitivityBuilder sensiBuildDecGBP = ZeroRateSensitivity.of(GBP, maturityTime, USD, sense_gbp1);
sensiBuildDecGBP = sensiBuildDecGBP.combinedWith(ZeroRateSensitivity.of(USD, maturityTime, USD, sense_usd1));
CurrencyParameterSensitivities paramSensiCmpGBP = test.parameterSensitivity(sensiBuildCmpGBP.build().normalized());
CurrencyParameterSensitivities paramSensiExpGBP = test.parameterSensitivity(sensiBuildDecGBP.build().normalized());
assertTrue(paramSensiCmpGBP.equalWithTolerance(paramSensiExpGBP, EPS_FD));
// USD based
PointSensitivityBuilder sensiBuildCmpUSD = test.fxIndexRates(GBP_USD_WM).ratePointSensitivity(obs, USD);
FxIndexSensitivity sensiBuildExpUSD = FxIndexSensitivity.of(obs, USD, GBP, 1.0);
assertTrue(sensiBuildCmpUSD.Equals(sensiBuildExpUSD));
double sense_gbp2 = 0.5 * (test_gbp_up.fxIndexRates(GBP_USD_WM).rate(obs, USD) - test_gbp_dw.fxIndexRates(GBP_USD_WM).rate(obs, USD)) / EPS_FD * (-maturityTime * GBP_DSC);
double sense_usd2 = 0.5 * (test_usd_up.fxIndexRates(GBP_USD_WM).rate(obs, USD) - test_usd_dw.fxIndexRates(GBP_USD_WM).rate(obs, USD)) / EPS_FD * (-maturityTime * USD_DSC);
PointSensitivityBuilder sensiBuildDecUSD = ZeroRateSensitivity.of(GBP, maturityTime, GBP, sense_gbp2);
sensiBuildDecUSD = sensiBuildDecUSD.combinedWith(ZeroRateSensitivity.of(USD, maturityTime, GBP, sense_usd2));
CurrencyParameterSensitivities paramSensiCmpUSD = test.parameterSensitivity(sensiBuildCmpUSD.build().normalized());
CurrencyParameterSensitivities paramSensiExpUSD = test.parameterSensitivity(sensiBuildDecUSD.build().normalized());
assertTrue(paramSensiCmpUSD.equalWithTolerance(paramSensiExpUSD, EPS_FD));
}
public virtual void pointAndParameterPriceIndex()
{
double eps = 1.0e-13;
LocalDate valuationDate = LocalDate.of(2014, 1, 22);
DoubleArray x = DoubleArray.of(0.5, 1.0, 2.0);
DoubleArray y = DoubleArray.of(224.2, 262.6, 277.5);
CurveInterpolator interp = CurveInterpolators.NATURAL_CUBIC_SPLINE;
string curveName = "GB_RPI_CURVE";
InterpolatedNodalCurve interpCurve = InterpolatedNodalCurve.of(Curves.prices(curveName), x, y, interp);
ImmutableRatesProvider provider = ImmutableRatesProvider.builder(VAL_DATE).priceIndexCurve(GB_RPI, interpCurve).timeSeries(GB_RPI, LocalDateDoubleTimeSeries.of(date(2013, 11, 30), 200)).build();
double pointSensiValue = 2.5;
YearMonth refMonth = YearMonth.from(valuationDate.plusMonths(9));
InflationRateSensitivity pointSensi = InflationRateSensitivity.of(PriceIndexObservation.of(GB_RPI, refMonth), pointSensiValue);
CurrencyParameterSensitivities computed = provider.parameterSensitivity(pointSensi.build());
DoubleArray sensiComputed = computed.Sensitivities.get(0).Sensitivity;
InflationRateSensitivity pointSensi1 = InflationRateSensitivity.of(PriceIndexObservation.of(GB_RPI, refMonth), 1);
DoubleArray sensiExpectedUnit = provider.priceIndexValues(GB_RPI).parameterSensitivity(pointSensi1).Sensitivities.get(0).Sensitivity;
assertTrue(sensiComputed.equalWithTolerance(sensiExpectedUnit.multipliedBy(pointSensiValue), eps));
}