//-------------------------------------------------------------------------
public virtual void test_rateSensitivity()
{
ImmutableRatesProvider prov = createProvider(RATE_START, RATE_START_INTERP, RATE_END, RATE_END_INTERP);
ImmutableRatesProvider provSrtUp = createProvider(RATE_START + EPS_FD, RATE_START_INTERP, RATE_END, RATE_END_INTERP);
ImmutableRatesProvider provSrtDw = createProvider(RATE_START - EPS_FD, RATE_START_INTERP, RATE_END, RATE_END_INTERP);
ImmutableRatesProvider provSrtIntUp = createProvider(RATE_START, RATE_START_INTERP + EPS_FD, RATE_END, RATE_END_INTERP);
ImmutableRatesProvider provSrtIntDw = createProvider(RATE_START, RATE_START_INTERP - EPS_FD, RATE_END, RATE_END_INTERP);
ImmutableRatesProvider provEndUp = createProvider(RATE_START, RATE_START_INTERP, RATE_END + EPS_FD, RATE_END_INTERP);
ImmutableRatesProvider provEndDw = createProvider(RATE_START, RATE_START_INTERP, RATE_END - EPS_FD, RATE_END_INTERP);
ImmutableRatesProvider provEndIntUp = createProvider(RATE_START, RATE_START_INTERP, RATE_END, RATE_END_INTERP + EPS_FD);
ImmutableRatesProvider provEndIntDw = createProvider(RATE_START, RATE_START_INTERP, RATE_END, RATE_END_INTERP - EPS_FD);
InflationInterpolatedRateComputation ro = InflationInterpolatedRateComputation.of(GB_RPIX, REF_START_MONTH, REF_END_MONTH, WEIGHT);
ForwardInflationInterpolatedRateComputationFn obsFn = ForwardInflationInterpolatedRateComputationFn.DEFAULT;
double rateSrtUp = obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, provSrtUp);
double rateSrtDw = obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, provSrtDw);
double rateSrtIntUp = obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, provSrtIntUp);
double rateSrtIntDw = obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, provSrtIntDw);
double rateEndUp = obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, provEndUp);
double rateEndDw = obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, provEndDw);
double rateEndIntUp = obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, provEndIntUp);
double rateEndIntDw = obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, provEndIntDw);
PointSensitivityBuilder sensSrt = InflationRateSensitivity.of(PriceIndexObservation.of(GB_RPIX, REF_START_MONTH), 0.5 * (rateSrtUp - rateSrtDw) / EPS_FD);
PointSensitivityBuilder sensSrtInt = InflationRateSensitivity.of(PriceIndexObservation.of(GB_RPIX, REF_START_MONTH_INTERP), 0.5 * (rateSrtIntUp - rateSrtIntDw) / EPS_FD);
PointSensitivityBuilder sensEnd = InflationRateSensitivity.of(PriceIndexObservation.of(GB_RPIX, REF_END_MONTH), 0.5 * (rateEndUp - rateEndDw) / EPS_FD);
PointSensitivityBuilder sensEndInt = InflationRateSensitivity.of(PriceIndexObservation.of(GB_RPIX, REF_END_MONTH_INTERP), 0.5 * (rateEndIntUp - rateEndIntDw) / EPS_FD);
PointSensitivityBuilder sensiExpected = sensSrt.combinedWith(sensSrtInt).combinedWith(sensEnd).combinedWith(sensEndInt);
PointSensitivityBuilder sensiComputed = obsFn.rateSensitivity(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, prov);
assertTrue(sensiComputed.build().normalized().equalWithTolerance(sensiExpected.build().normalized(), EPS_FD));
}
//-------------------------------------------------------------------------
public virtual void test_rate()
{
ImmutableRatesProvider prov = createProvider(RATE_START, RATE_START_INTERP, RATE_END, RATE_END_INTERP);
InflationInterpolatedRateComputation ro = InflationInterpolatedRateComputation.of(GB_RPIX, REF_START_MONTH, REF_END_MONTH, WEIGHT);
ForwardInflationInterpolatedRateComputationFn obsFn = ForwardInflationInterpolatedRateComputationFn.DEFAULT;
double rateExpected = (WEIGHT * RATE_END + (1.0 - WEIGHT) * RATE_END_INTERP) / (WEIGHT * RATE_START + (1.0 - WEIGHT) * RATE_START_INTERP) - 1.0;
assertEquals(obsFn.rate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, prov), rateExpected, EPS);
// explain
ExplainMapBuilder builder = ExplainMap.builder();
assertEquals(obsFn.explainRate(ro, DUMMY_ACCRUAL_START_DATE, DUMMY_ACCRUAL_END_DATE, prov, builder), rateExpected, EPS);
ExplainMap built = builder.build();
assertEquals(built.get(ExplainKey.OBSERVATIONS).Present, true);
assertEquals(built.get(ExplainKey.OBSERVATIONS).get().size(), 4);
ExplainMap explain0 = built.get(ExplainKey.OBSERVATIONS).get().get(0);
assertEquals(explain0.get(ExplainKey.FIXING_DATE), REF_START_MONTH.atEndOfMonth());
assertEquals(explain0.get(ExplainKey.INDEX), GB_RPIX);
assertEquals(explain0.get(ExplainKey.INDEX_VALUE), RATE_START);
assertEquals(explain0.get(ExplainKey.WEIGHT), WEIGHT);
ExplainMap explain1 = built.get(ExplainKey.OBSERVATIONS).get().get(1);
assertEquals(explain1.get(ExplainKey.FIXING_DATE), REF_START_MONTH_INTERP.atEndOfMonth());
assertEquals(explain1.get(ExplainKey.INDEX), GB_RPIX);
assertEquals(explain1.get(ExplainKey.INDEX_VALUE), RATE_START_INTERP);
assertEquals(explain1.get(ExplainKey.WEIGHT), (1d - WEIGHT));
ExplainMap explain2 = built.get(ExplainKey.OBSERVATIONS).get().get(2);
assertEquals(explain2.get(ExplainKey.FIXING_DATE), REF_END_MONTH.atEndOfMonth());
assertEquals(explain2.get(ExplainKey.INDEX), GB_RPIX);
assertEquals(explain2.get(ExplainKey.INDEX_VALUE), RATE_END);
assertEquals(explain2.get(ExplainKey.WEIGHT), WEIGHT);
ExplainMap explain3 = built.get(ExplainKey.OBSERVATIONS).get().get(3);
assertEquals(explain3.get(ExplainKey.FIXING_DATE), REF_END_MONTH_INTERP.atEndOfMonth());
assertEquals(explain3.get(ExplainKey.INDEX), GB_RPIX);
assertEquals(explain3.get(ExplainKey.INDEX_VALUE), RATE_END_INTERP);
assertEquals(explain3.get(ExplainKey.WEIGHT), (1d - WEIGHT));
assertEquals(built.get(ExplainKey.COMBINED_RATE).Value.doubleValue(), rateExpected, EPS);
}
public virtual void test_createAccrualPeriods_Interpolated()
{
InflationRateCalculation test = InflationRateCalculation.builder().index(CH_CPI).lag(Period.ofMonths(3)).indexCalculationMethod(INTERPOLATED).build();
double weight1 = 1.0 - 4.0 / 28.0;
double weight2 = 1.0 - 6.0 / 31.0;
double weight3 = 1.0 - 4.0 / 30.0;
RateAccrualPeriod rap1 = RateAccrualPeriod.builder(ACCRUAL1).yearFraction(1.0).rateComputation(InflationInterpolatedRateComputation.of(CH_CPI, YearMonth.from(DATE_2015_01_05).minusMonths(3), YearMonth.from(DATE_2015_02_05).minusMonths(3), weight1)).build();
RateAccrualPeriod rap2 = RateAccrualPeriod.builder(ACCRUAL2).yearFraction(1.0).rateComputation(InflationInterpolatedRateComputation.of(CH_CPI, YearMonth.from(DATE_2015_02_05).minusMonths(3), YearMonth.from(DATE_2015_03_07).minusMonths(3), weight2)).build();
RateAccrualPeriod rap3 = RateAccrualPeriod.builder(ACCRUAL3).yearFraction(1.0).rateComputation(InflationInterpolatedRateComputation.of(CH_CPI, YearMonth.from(DATE_2015_03_07).minusMonths(3), YearMonth.from(DATE_2015_04_05).minusMonths(3), weight3)).build();
ImmutableList <RateAccrualPeriod> periods = test.createAccrualPeriods(ACCRUAL_SCHEDULE, ACCRUAL_SCHEDULE, REF_DATA);
assertEquals(periods, ImmutableList.of(rap1, rap2, rap3));
}
public virtual void test_inflation_interpolated()
{
BusinessDayAdjustment bda = BusinessDayAdjustment.of(FOLLOWING, GBLO);
PeriodicSchedule accrualSchedule = PeriodicSchedule.builder().startDate(DATE_14_06_09).endDate(DATE_19_06_09).frequency(Frequency.ofYears(5)).businessDayAdjustment(bda).build();
PaymentSchedule paymentSchedule = PaymentSchedule.builder().paymentFrequency(Frequency.ofYears(5)).paymentDateOffset(DaysAdjustment.ofBusinessDays(2, GBLO)).build();
InflationRateCalculation rateCalc = InflationRateCalculation.builder().index(GB_RPI).indexCalculationMethod(INTERPOLATED).lag(Period.ofMonths(3)).build();
NotionalSchedule notionalSchedule = NotionalSchedule.of(GBP, 1000d);
RateCalculationSwapLeg test = RateCalculationSwapLeg.builder().payReceive(RECEIVE).accrualSchedule(accrualSchedule).paymentSchedule(paymentSchedule).notionalSchedule(notionalSchedule).calculation(rateCalc).build();
assertEquals(test.StartDate, AdjustableDate.of(DATE_14_06_09, bda));
assertEquals(test.EndDate, AdjustableDate.of(DATE_19_06_09, bda));
assertEquals(test.Currency, GBP);
assertEquals(test.PayReceive, RECEIVE);
assertEquals(test.AccrualSchedule, accrualSchedule);
assertEquals(test.PaymentSchedule, paymentSchedule);
assertEquals(test.NotionalSchedule, notionalSchedule);
assertEquals(test.Calculation, rateCalc);
double weight = 1.0 - 9.0 / 30.0;
RatePaymentPeriod rpp0 = RatePaymentPeriod.builder().paymentDate(DaysAdjustment.ofBusinessDays(2, GBLO).adjust(bda.adjust(DATE_19_06_09, REF_DATA), REF_DATA)).accrualPeriods(RateAccrualPeriod.builder().startDate(bda.adjust(DATE_14_06_09, REF_DATA)).endDate(bda.adjust(DATE_19_06_09, REF_DATA)).unadjustedStartDate(DATE_14_06_09).unadjustedEndDate(DATE_19_06_09).yearFraction(1.0).rateComputation(InflationInterpolatedRateComputation.of(GB_RPI, YearMonth.from(bda.adjust(DATE_14_06_09, REF_DATA)).minusMonths(3), YearMonth.from(bda.adjust(DATE_19_06_09, REF_DATA)).minusMonths(3), weight)).build()).dayCount(ONE_ONE).currency(GBP).notional(1000d).build();
ResolvedSwapLeg expected = ResolvedSwapLeg.builder().paymentPeriods(rpp0).payReceive(RECEIVE).type(SwapLegType.INFLATION).build();
ResolvedSwapLeg testExpand = test.resolve(REF_DATA);
assertEquals(testExpand, expected);
}
