//-------------------------------------------------------------------------
public override CurrencyAmount parallelCs01(ResolvedCdsTrade trade, IList <ResolvedCdsTrade> bucketCds, CreditRatesProvider ratesProvider, ReferenceData refData)
{
checkCdsBucket(trade, bucketCds);
ResolvedCds product = trade.Product;
Currency currency = product.Currency;
StandardId legalEntityId = product.LegalEntityId;
LocalDate valuationDate = ratesProvider.ValuationDate;
ImmutableCreditRatesProvider immutableRatesProvider = ratesProvider.toImmutableCreditRatesProvider();
int nBucket = bucketCds.Count;
DoubleArray impSp = impliedSpread(bucketCds, ratesProvider, refData);
NodalCurve creditCurveBase = Calibrator.calibrate(bucketCds, impSp, DoubleArray.filled(nBucket), CurveName.of("baseImpliedCreditCurve"), valuationDate, ratesProvider.discountFactors(currency), ratesProvider.recoveryRates(legalEntityId), refData);
Pair <StandardId, Currency> lePair = Pair.of(legalEntityId, currency);
IsdaCreditDiscountFactors df = IsdaCreditDiscountFactors.of(currency, valuationDate, creditCurveBase);
CreditRatesProvider ratesProviderBase = immutableRatesProvider.toBuilder().creditCurves(ImmutableMap.of(lePair, LegalEntitySurvivalProbabilities.of(legalEntityId, df))).build();
CurrencyAmount pvBase = Pricer.presentValueOnSettle(trade, ratesProviderBase, PriceType.DIRTY, refData);
DoubleArray bumpedSp = DoubleArray.of(nBucket, i => impSp.get(i) + bumpAmount);
NodalCurve creditCurveBump = Calibrator.calibrate(bucketCds, bumpedSp, DoubleArray.filled(nBucket), CurveName.of("bumpedImpliedCreditCurve"), valuationDate, ratesProvider.discountFactors(currency), ratesProvider.recoveryRates(legalEntityId), refData);
IsdaCreditDiscountFactors dfBump = IsdaCreditDiscountFactors.of(currency, valuationDate, creditCurveBump);
CreditRatesProvider ratesProviderBump = immutableRatesProvider.toBuilder().creditCurves(ImmutableMap.of(lePair, LegalEntitySurvivalProbabilities.of(legalEntityId, dfBump))).build();
CurrencyAmount pvBumped = Pricer.presentValueOnSettle(trade, ratesProviderBump, PriceType.DIRTY, refData);
return(CurrencyAmount.of(currency, (pvBumped.Amount - pvBase.Amount) / bumpAmount));
}
internal override DoubleArray computedBucketedCs01(ResolvedCdsTrade trade, IList <ResolvedCdsTrade> bucketCds, CreditRatesProvider ratesProvider, ReferenceData refData)
{
checkCdsBucket(trade, bucketCds);
ResolvedCds product = trade.Product;
Currency currency = product.Currency;
StandardId legalEntityId = product.LegalEntityId;
LocalDate valuationDate = ratesProvider.ValuationDate;
ImmutableCreditRatesProvider immutableRatesProvider = ratesProvider.toImmutableCreditRatesProvider();
int nBucket = bucketCds.Count;
double[] res = new double[nBucket];
DoubleArray impSp = impliedSpread(bucketCds, ratesProvider, refData);
NodalCurve creditCurveBase = Calibrator.calibrate(bucketCds, impSp, DoubleArray.filled(nBucket), CurveName.of("baseImpliedCreditCurve"), valuationDate, ratesProvider.discountFactors(currency), ratesProvider.recoveryRates(legalEntityId), refData);
Pair <StandardId, Currency> lePair = Pair.of(legalEntityId, currency);
IsdaCreditDiscountFactors df = IsdaCreditDiscountFactors.of(currency, valuationDate, creditCurveBase);
CreditRatesProvider ratesProviderBase = immutableRatesProvider.toBuilder().creditCurves(ImmutableMap.of(lePair, LegalEntitySurvivalProbabilities.of(legalEntityId, df))).build();
double pvBase = Pricer.presentValueOnSettle(trade, ratesProviderBase, PriceType.DIRTY, refData).Amount;
for (int i = 0; i < nBucket; ++i)
{
double[] bumpedSp = impSp.toArray();
bumpedSp[i] += bumpAmount;
NodalCurve creditCurveBump = Calibrator.calibrate(bucketCds, DoubleArray.ofUnsafe(bumpedSp), DoubleArray.filled(nBucket), CurveName.of("bumpedImpliedCreditCurve"), valuationDate, ratesProvider.discountFactors(currency), ratesProvider.recoveryRates(legalEntityId), refData);
IsdaCreditDiscountFactors dfBump = IsdaCreditDiscountFactors.of(currency, valuationDate, creditCurveBump);
CreditRatesProvider ratesProviderBump = immutableRatesProvider.toBuilder().creditCurves(ImmutableMap.of(lePair, LegalEntitySurvivalProbabilities.of(legalEntityId, dfBump))).build();
double pvBumped = Pricer.presentValueOnSettle(trade, ratesProviderBump, PriceType.DIRTY, refData).Amount;
res[i] = (pvBumped - pvBase) / bumpAmount;
}
return(DoubleArray.ofUnsafe(res));
}
public virtual void test_singleDiscountCurveParameterSensitivity()
{
ZeroRateSensitivity zeroPt = ZeroRateSensitivity.of(USD, 10d, 5d);
CreditCurveZeroRateSensitivity creditPt = CreditCurveZeroRateSensitivity.of(LEGAL_ENTITY_ABC, JPY, 2d, 3d);
FxForwardSensitivity fxPt = FxForwardSensitivity.of(CurrencyPair.of(JPY, USD), USD, LocalDate.of(2017, 2, 14), 15d);
CreditRatesProvider test = ImmutableCreditRatesProvider.builder().creditCurves(ImmutableMap.of(Pair.of(LEGAL_ENTITY_ABC, USD), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_USD), Pair.of(LEGAL_ENTITY_ABC, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_JPY), Pair.of(LEGAL_ENTITY_DEF, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_DEF, CRD_DEF))).discountCurves(ImmutableMap.of(USD, DSC_USD, JPY, DSC_JPY)).recoveryRateCurves(ImmutableMap.of(LEGAL_ENTITY_ABC, RR_ABC, LEGAL_ENTITY_DEF, RR_DEF)).valuationDate(VALUATION).build();
CurrencyParameterSensitivities computed = CurrencyParameterSensitivities.of(test.singleDiscountCurveParameterSensitivity(zeroPt.combinedWith(creditPt).combinedWith(fxPt).build(), USD));
CurrencyParameterSensitivities expected = DSC_USD.parameterSensitivity(zeroPt);
assertTrue(computed.equalWithTolerance(expected, 1.0e-14));
}
public virtual void test_valuationDateMismatch()
{
ConstantRecoveryRates rr_wrong = ConstantRecoveryRates.of(LEGAL_ENTITY_ABC, VALUATION.plusWeeks(1), RECOVERY_RATE_ABC);
assertThrowsIllegalArg(() => ImmutableCreditRatesProvider.builder().valuationDate(VALUATION).creditCurves(ImmutableMap.of(Pair.of(LEGAL_ENTITY_ABC, USD), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_USD), Pair.of(LEGAL_ENTITY_ABC, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_JPY), Pair.of(LEGAL_ENTITY_DEF, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_DEF, CRD_DEF))).discountCurves(ImmutableMap.of(USD, DSC_USD, JPY, DSC_JPY)).recoveryRateCurves(ImmutableMap.of(LEGAL_ENTITY_ABC, rr_wrong, LEGAL_ENTITY_DEF, RR_DEF)).build());
IsdaCreditDiscountFactors crd_wrong = IsdaCreditDiscountFactors.of(JPY, VALUATION.plusWeeks(1), NAME_CRD_DEF, TIME_CRD_DEF, RATE_CRD_DEF, ACT_365F);
assertThrowsIllegalArg(() => ImmutableCreditRatesProvider.builder().valuationDate(VALUATION).creditCurves(ImmutableMap.of(Pair.of(LEGAL_ENTITY_ABC, USD), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_USD), Pair.of(LEGAL_ENTITY_ABC, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_JPY), Pair.of(LEGAL_ENTITY_DEF, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_DEF, crd_wrong))).discountCurves(ImmutableMap.of(USD, DSC_USD, JPY, DSC_JPY)).recoveryRateCurves(ImmutableMap.of(LEGAL_ENTITY_ABC, RR_ABC, LEGAL_ENTITY_DEF, RR_DEF)).build());
IsdaCreditDiscountFactors dsc_wrong = IsdaCreditDiscountFactors.of(USD, VALUATION.plusWeeks(1), NAME_DSC_USD, TIME_DSC_USD, RATE_DSC_USD, ACT_365F);
assertThrowsIllegalArg(() => ImmutableCreditRatesProvider.builder().valuationDate(VALUATION).creditCurves(ImmutableMap.of(Pair.of(LEGAL_ENTITY_ABC, USD), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_USD), Pair.of(LEGAL_ENTITY_ABC, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_JPY), Pair.of(LEGAL_ENTITY_DEF, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_DEF, CRD_DEF))).discountCurves(ImmutableMap.of(USD, dsc_wrong, JPY, DSC_JPY)).recoveryRateCurves(ImmutableMap.of(LEGAL_ENTITY_ABC, RR_ABC, LEGAL_ENTITY_DEF, RR_DEF)).build());
}
//-------------------------------------------------------------------------
public virtual void coverage()
{
ImmutableCreditRatesProvider test1 = ImmutableCreditRatesProvider.builder().creditCurves(ImmutableMap.of(Pair.of(LEGAL_ENTITY_ABC, USD), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_USD))).discountCurves(ImmutableMap.of(USD, DSC_USD)).recoveryRateCurves(ImmutableMap.of(LEGAL_ENTITY_ABC, RR_ABC)).valuationDate(VALUATION).build();
coverImmutableBean(test1);
IsdaCreditDiscountFactors dsc = IsdaCreditDiscountFactors.of(JPY, VALUATION.plusDays(1), NAME_DSC_JPY, TIME_DSC_JPY, RATE_DSC_JPY, ACT_365F);
IsdaCreditDiscountFactors hzd = IsdaCreditDiscountFactors.of(JPY, VALUATION.plusDays(1), NAME_CRD_DEF, TIME_CRD_DEF, RATE_CRD_DEF, ACT_365F);
ConstantRecoveryRates rr = ConstantRecoveryRates.of(LEGAL_ENTITY_DEF, VALUATION.plusDays(1), RECOVERY_RATE_DEF);
ImmutableCreditRatesProvider test2 = ImmutableCreditRatesProvider.builder().creditCurves(ImmutableMap.of(Pair.of(LEGAL_ENTITY_DEF, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_DEF, hzd))).discountCurves(ImmutableMap.of(JPY, dsc)).recoveryRateCurves(ImmutableMap.of(LEGAL_ENTITY_DEF, rr)).valuationDate(VALUATION.plusDays(1)).build();
coverBeanEquals(test1, test2);
}
//-------------------------------------------------------------------------
private static ImmutableCreditRatesProvider createRatesProvider(LocalDate tradeDate, LocalDate snapDate, double rateScale, double recoveryRate)
{
ImmutableMarketDataBuilder builder = ImmutableMarketData.builder(snapDate);
for (int j = 0; j < NUM_INSTRUMENTS; j++)
{
builder.addValue(QuoteId.of(StandardId.of("OG", ID_VALUES[j])), RATES[j] * rateScale);
}
ImmutableMarketData quotes = builder.build();
IsdaCreditCurveDefinition curveDefinition = IsdaCreditCurveDefinition.of(CurveName.of("yield"), EUR, tradeDate, ACT_365F, DSC_NODES, false, false);
IsdaCreditDiscountFactors yc = IsdaCompliantDiscountCurveCalibrator.standard().calibrate(curveDefinition, quotes, REF_DATA);
return(ImmutableCreditRatesProvider.builder().valuationDate(tradeDate).discountCurves(ImmutableMap.of(EUR, yc)).recoveryRateCurves(ImmutableMap.of(LEGAL_ENTITY, ConstantRecoveryRates.of(LEGAL_ENTITY, tradeDate, recoveryRate))).creditCurves(ImmutableMap.of()).build());
}
public virtual void test_getter()
{
ImmutableCreditRatesProvider test = ImmutableCreditRatesProvider.builder().valuationDate(VALUATION).creditCurves(ImmutableMap.of(Pair.of(LEGAL_ENTITY_ABC, USD), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_USD), Pair.of(LEGAL_ENTITY_ABC, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_JPY), Pair.of(LEGAL_ENTITY_DEF, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_DEF, CRD_DEF))).discountCurves(ImmutableMap.of(USD, DSC_USD, JPY, DSC_JPY)).recoveryRateCurves(ImmutableMap.of(LEGAL_ENTITY_ABC, RR_ABC, LEGAL_ENTITY_DEF, RR_DEF)).build();
assertEquals(test.discountFactors(USD), DSC_USD);
assertEquals(test.discountFactors(JPY), DSC_JPY);
assertEquals(test.survivalProbabilities(LEGAL_ENTITY_ABC, USD), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_USD));
assertEquals(test.survivalProbabilities(LEGAL_ENTITY_ABC, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_ABC, CRD_ABC_JPY));
assertEquals(test.survivalProbabilities(LEGAL_ENTITY_DEF, JPY), LegalEntitySurvivalProbabilities.of(LEGAL_ENTITY_DEF, CRD_DEF));
assertEquals(test.recoveryRates(LEGAL_ENTITY_ABC), RR_ABC);
assertEquals(test.recoveryRates(LEGAL_ENTITY_DEF), RR_DEF);
StandardId entity = StandardId.of("OG", "NONE");
assertThrowsIllegalArg(() => test.discountFactors(EUR));
assertThrowsIllegalArg(() => test.survivalProbabilities(LEGAL_ENTITY_DEF, USD));
assertThrowsIllegalArg(() => test.survivalProbabilities(entity, USD));
assertThrowsIllegalArg(() => test.recoveryRates(entity));
}
//-------------------------------------------------------------------------
protected internal virtual void testCalibrationAgainstISDA(IsdaCompliantCreditCurveCalibrator builder, DayCount dayCount, Currency currency, double tol)
{
IsdaCdsProductPricer pricer = new IsdaCdsProductPricer(builder.AccrualOnDefaultFormula);
for (int i = 0; i < NUM_TESTS; i++)
{
LegalEntitySurvivalProbabilities creditCurve = builder.calibrate(ImmutableList.copyOf(NODE_CDS[i]), CurveName.of("credit"), CDS_MARKET_DATA[i], YIELD_CURVES[i], dayCount, currency, false, false, REF_DATA);
ResolvedCdsTrade[] expectedCds = EXP_NODE_CDS[i];
ImmutableCreditRatesProvider provider = YIELD_CURVES[i].toBuilder().creditCurves(ImmutableMap.of(Pair.of(LEGAL_ENTITY, EUR), creditCurve)).build();
double[] expected = builder.AccrualOnDefaultFormula == AccrualOnDefaultFormula.MARKIT_FIX ? EXP_PROB_MARKIT_FIX[i] : EXP_PROB_ISDA[i];
for (int k = 0; k < N_OBS; k++)
{
assertEquals(creditCurve.SurvivalProbabilities.discountFactor(OBS_TIMES[k]), expected[k], tol);
}
int m = expectedCds.Length;
for (int j = 0; j < m; j++)
{
ResolvedCdsTrade cdsFromNode = NODE_CDS[i][j].trade(1d, CDS_MARKET_DATA[i], REF_DATA).UnderlyingTrade.resolve(REF_DATA);
assertEquals(cdsFromNode.Product, expectedCds[j].Product);
double price1 = pricer.price(cdsFromNode.Product, provider, SPREADS[i][j], cdsFromNode.Info.SettlementDate.get(), PriceType.CLEAN, REF_DATA);
assertEquals(price1, 0.0, 5e-16);
}
}
}
private double[] getStandardQuoteForm(ResolvedCdsTrade calibrationCds, CdsQuote marketQuote, LocalDate valuationDate, CreditDiscountFactors discountFactors, RecoveryRates recoveryRates, bool computeJacobian, ReferenceData refData)
{
double[] res = new double[3];
res[2] = 1d;
if (marketQuote.QuoteConvention.Equals(CdsQuoteConvention.PAR_SPREAD))
{
res[0] = marketQuote.QuotedValue;
}
else if (marketQuote.QuoteConvention.Equals(CdsQuoteConvention.QUOTED_SPREAD))
{
double qSpread = marketQuote.QuotedValue;
CurveName curveName = CurveName.of("quoteConvertCurve");
NodalCurve tempCreditCurve = calibrate(ImmutableList.of(calibrationCds), DoubleArray.of(qSpread), DoubleArray.of(0d), curveName, valuationDate, discountFactors, recoveryRates, refData);
Currency currency = calibrationCds.Product.Currency;
StandardId legalEntityId = calibrationCds.Product.LegalEntityId;
ImmutableCreditRatesProvider rates = ImmutableCreditRatesProvider.builder().valuationDate(valuationDate).discountCurves(ImmutableMap.of(currency, discountFactors)).recoveryRateCurves(ImmutableMap.of(legalEntityId, recoveryRates)).creditCurves(ImmutableMap.of(Pair.of(legalEntityId, currency), LegalEntitySurvivalProbabilities.of(legalEntityId, IsdaCreditDiscountFactors.of(currency, valuationDate, tempCreditCurve)))).build();
res[0] = calibrationCds.Product.FixedRate;
res[1] = tradePricer.price(calibrationCds, rates, PriceType.CLEAN, refData);
if (computeJacobian)
{
CurrencyParameterSensitivities pufSensi = rates.parameterSensitivity(tradePricer.priceSensitivity(calibrationCds, rates, refData));
CurrencyParameterSensitivities spSensi = rates.parameterSensitivity(tradePricer.parSpreadSensitivity(calibrationCds, rates, refData));
res[2] = spSensi.getSensitivity(curveName, currency).Sensitivity.get(0) / pufSensi.getSensitivity(curveName, currency).Sensitivity.get(0);
}
}
else if (marketQuote.QuoteConvention.Equals(CdsQuoteConvention.POINTS_UPFRONT))
{
res[0] = calibrationCds.Product.FixedRate;
res[1] = marketQuote.QuotedValue;
}
else
{
throw new System.ArgumentException("Unknown CDSQuoteConvention type " + marketQuote.GetType());
}
return(res);
}
//-------------------------------------------------------------------------
protected internal virtual void testJacobian(LegalEntitySurvivalProbabilities curve, ImmutableCreditRatesProvider ratesProvider, IList <CdsIndexIsdaCreditCurveNode> nodes, double[] quotes)
{
int nNode = nodes.Count;
IsdaCreditDiscountFactors df = (IsdaCreditDiscountFactors)curve.SurvivalProbabilities;
int nCurveNode = df.ParameterCount;
for (int i = 0; i < nCurveNode; ++i)
{
double[] quotesUp = Arrays.copyOf(quotes, nNode);
double[] quotesDw = Arrays.copyOf(quotes, nNode);
quotesUp[i] += EPS;
quotesDw[i] -= EPS;
ImmutableMarketDataBuilder builderCreditUp = MARKET_DATA.toBuilder();
ImmutableMarketDataBuilder builderCreditDw = MARKET_DATA.toBuilder();
for (int j = 0; j < nNode; ++j)
{
builderCreditUp.addValue(nodes[j].ObservableId, quotesUp[j]);
builderCreditDw.addValue(nodes[j].ObservableId, quotesDw[j]);
}
ImmutableMarketData marketDataUp = builderCreditUp.build();
ImmutableMarketData marketDataDw = builderCreditDw.build();
IsdaCreditCurveDefinition definition = IsdaCreditCurveDefinition.of(df.Curve.Name, df.Currency, df.ValuationDate, df.DayCount, nodes, false, false);
IsdaCreditDiscountFactors ccUp = (IsdaCreditDiscountFactors)CALIBRATOR.calibrate(definition, marketDataUp, ratesProvider, REF_DATA).SurvivalProbabilities;
IsdaCreditDiscountFactors ccDw = (IsdaCreditDiscountFactors)CALIBRATOR.calibrate(definition, marketDataDw, ratesProvider, REF_DATA).SurvivalProbabilities;
for (int j = 0; j < nNode; ++j)
{
double computed = df.Curve.Metadata.findInfo(CurveInfoType.JACOBIAN).get().JacobianMatrix.get(j, i);
double expected = 0.5 * (ccUp.Curve.YValues.get(j) - ccDw.Curve.YValues.get(j)) / EPS;
assertEquals(computed, expected, EPS * 10d);
}
}
}
protected internal virtual void testJacobian(IsdaCompliantCreditCurveCalibrator builder, LegalEntitySurvivalProbabilities curve, ImmutableCreditRatesProvider ratesProvider, IList <CdsIsdaCreditCurveNode> nodes, double[] quotes, double quoteScale, double eps)
{
LocalDate valuationDate = curve.ValuationDate;
int nNode = nodes.Count;
IsdaCreditDiscountFactors df = (IsdaCreditDiscountFactors)curve.SurvivalProbabilities;
CurveName name = df.Curve.Name;
int nCurveNode = df.ParameterCount;
for (int i = 0; i < nCurveNode; ++i)
{
double[] quotesUp = Arrays.copyOf(quotes, nNode);
double[] quotesDw = Arrays.copyOf(quotes, nNode);
quotesUp[i] += eps / quoteScale;
quotesDw[i] -= eps / quoteScale;
ImmutableMarketDataBuilder builderCreditUp = ImmutableMarketData.builder(valuationDate);
ImmutableMarketDataBuilder builderCreditDw = ImmutableMarketData.builder(valuationDate);
for (int j = 0; j < nNode; ++j)
{
builderCreditUp.addValue(nodes[j].ObservableId, quotesUp[j] * quoteScale);
builderCreditDw.addValue(nodes[j].ObservableId, quotesDw[j] * quoteScale);
}
ImmutableMarketData marketDataUp = builderCreditUp.build();
ImmutableMarketData marketDataDw = builderCreditDw.build();
IsdaCreditDiscountFactors ccUp = (IsdaCreditDiscountFactors)builder.calibrate(nodes, name, marketDataUp, ratesProvider, curve.SurvivalProbabilities.DayCount, curve.Currency, false, false, REF_DATA).SurvivalProbabilities;
IsdaCreditDiscountFactors ccDw = (IsdaCreditDiscountFactors)builder.calibrate(nodes, name, marketDataDw, ratesProvider, curve.SurvivalProbabilities.DayCount, curve.Currency, false, false, REF_DATA).SurvivalProbabilities;
for (int j = 0; j < nNode; ++j)
{
double computed = df.Curve.Metadata.findInfo(CurveInfoType.JACOBIAN).get().JacobianMatrix.get(j, i);
double expected = 0.5 * (ccUp.Curve.YValues.get(j) - ccDw.Curve.YValues.get(j)) / eps;
assertEquals(computed, expected, eps * 10d);
}
}
}
internal virtual LegalEntitySurvivalProbabilities calibrate(IList <CdsIsdaCreditCurveNode> curveNodes, CurveName name, MarketData marketData, ImmutableCreditRatesProvider ratesProvider, DayCount definitionDayCount, Currency definitionCurrency, bool computeJacobian, bool storeTrade, ReferenceData refData)
{
//JAVA TO C# CONVERTER TODO TASK: Method reference arbitrary object instance method syntax is not converted by Java to C# Converter:
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
IEnumerator <StandardId> legalEntities = curveNodes.Select(CdsIsdaCreditCurveNode::getLegalEntityId).collect(Collectors.toSet()).GetEnumerator();
//JAVA TO C# CONVERTER TODO TASK: Java iterators are only converted within the context of 'while' and 'for' loops:
StandardId legalEntityId = legalEntities.next();
//JAVA TO C# CONVERTER TODO TASK: Java iterators are only converted within the context of 'while' and 'for' loops:
ArgChecker.isFalse(legalEntities.hasNext(), "legal entity must be common to curve nodes");
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
IEnumerator <Currency> currencies = curveNodes.Select(n => n.Template.Convention.Currency).collect(Collectors.toSet()).GetEnumerator();
//JAVA TO C# CONVERTER TODO TASK: Java iterators are only converted within the context of 'while' and 'for' loops:
Currency currency = currencies.next();
//JAVA TO C# CONVERTER TODO TASK: Java iterators are only converted within the context of 'while' and 'for' loops:
ArgChecker.isFalse(currencies.hasNext(), "currency must be common to curve nodes");
ArgChecker.isTrue(definitionCurrency.Equals(currency), "curve definition currency must be the same as the currency of CDS");
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
IEnumerator <CdsQuoteConvention> quoteConventions = curveNodes.Select(n => n.QuoteConvention).collect(Collectors.toSet()).GetEnumerator();
//JAVA TO C# CONVERTER TODO TASK: Java iterators are only converted within the context of 'while' and 'for' loops:
CdsQuoteConvention quoteConvention = quoteConventions.next();
//JAVA TO C# CONVERTER TODO TASK: Java iterators are only converted within the context of 'while' and 'for' loops:
ArgChecker.isFalse(quoteConventions.hasNext(), "quote convention must be common to curve nodes");
LocalDate valuationDate = marketData.ValuationDate;
ArgChecker.isTrue(valuationDate.Equals(marketData.ValuationDate), "ratesProvider and marketDate must be based on the same valuation date");
CreditDiscountFactors discountFactors = ratesProvider.discountFactors(currency);
ArgChecker.isTrue(definitionDayCount.Equals(discountFactors.DayCount), "credit curve and discount curve must be based on the same day count convention");
RecoveryRates recoveryRates = ratesProvider.recoveryRates(legalEntityId);
int nNodes = curveNodes.Count;
double[] coupons = new double[nNodes];
double[] pufs = new double[nNodes];
//JAVA TO C# CONVERTER NOTE: The following call to the 'RectangularArrays' helper class reproduces the rectangular array initialization that is automatic in Java:
//ORIGINAL LINE: double[][] diag = new double[nNodes][nNodes];
double[][] diag = RectangularArrays.ReturnRectangularDoubleArray(nNodes, nNodes);
ImmutableList.Builder <ResolvedCdsTrade> tradesBuilder = ImmutableList.builder();
for (int i = 0; i < nNodes; i++)
{
CdsCalibrationTrade tradeCalibration = curveNodes[i].trade(1d, marketData, refData);
ResolvedCdsTrade trade = tradeCalibration.UnderlyingTrade.resolve(refData);
tradesBuilder.add(trade);
double[] temp = getStandardQuoteForm(trade, tradeCalibration.Quote, valuationDate, discountFactors, recoveryRates, computeJacobian, refData);
coupons[i] = temp[0];
pufs[i] = temp[1];
diag[i][i] = temp[2];
}
ImmutableList <ResolvedCdsTrade> trades = tradesBuilder.build();
NodalCurve nodalCurve = calibrate(trades, DoubleArray.ofUnsafe(coupons), DoubleArray.ofUnsafe(pufs), name, valuationDate, discountFactors, recoveryRates, refData);
if (computeJacobian)
{
LegalEntitySurvivalProbabilities creditCurve = LegalEntitySurvivalProbabilities.of(legalEntityId, IsdaCreditDiscountFactors.of(currency, valuationDate, nodalCurve));
ImmutableCreditRatesProvider ratesProviderNew = ratesProvider.toBuilder().creditCurves(ImmutableMap.of(Pair.of(legalEntityId, currency), creditCurve)).build();
System.Func <ResolvedCdsTrade, DoubleArray> sensiFunc = quoteConvention.Equals(CdsQuoteConvention.PAR_SPREAD) ? getParSpreadSensitivityFunction(ratesProviderNew, name, currency, refData) : getPointsUpfrontSensitivityFunction(ratesProviderNew, name, currency, refData);
DoubleMatrix sensi = DoubleMatrix.ofArrayObjects(nNodes, nNodes, i => sensiFunc(trades.get(i)));
sensi = (DoubleMatrix)MATRIX_ALGEBRA.multiply(DoubleMatrix.ofUnsafe(diag), sensi);
JacobianCalibrationMatrix jacobian = JacobianCalibrationMatrix.of(ImmutableList.of(CurveParameterSize.of(name, nNodes)), MATRIX_ALGEBRA.getInverse(sensi));
nodalCurve = nodalCurve.withMetadata(nodalCurve.Metadata.withInfo(CurveInfoType.JACOBIAN, jacobian));
}
ImmutableList <ParameterMetadata> parameterMetadata;
if (storeTrade)
{
parameterMetadata = IntStream.range(0, nNodes).mapToObj(n => ResolvedTradeParameterMetadata.of(trades.get(n), curveNodes[n].Label)).collect(Guavate.toImmutableList());
}
else
{
parameterMetadata = IntStream.range(0, nNodes).mapToObj(n => curveNodes[n].metadata(trades.get(n).Product.ProtectionEndDate)).collect(Guavate.toImmutableList());
}
nodalCurve = nodalCurve.withMetadata(nodalCurve.Metadata.withParameterMetadata(parameterMetadata));
return(LegalEntitySurvivalProbabilities.of(legalEntityId, IsdaCreditDiscountFactors.of(currency, valuationDate, nodalCurve)));
}
//-------------------------------------------------------------------------
/// <summary>
/// Calibrates the ISDA compliant credit curve to the market data.
/// <para>
/// This creates the single credit curve for a legal entity.
/// The curve nodes in {@code IsdaCreditCurveDefinition} should be single-name credit default swaps on this legal entity.
/// </para>
/// <para>
/// The relevant discount curve and recovery rate curve must be stored in {@code ratesProvider}.
/// The day count convention for the resulting credit curve is the same as that of the discount curve.
///
/// </para>
/// </summary>
/// <param name="curveDefinition"> the curve definition </param>
/// <param name="marketData"> the market data </param>
/// <param name="ratesProvider"> the rates provider </param>
/// <param name="refData"> the reference data </param>
/// <returns> the ISDA compliant credit curve </returns>
public virtual LegalEntitySurvivalProbabilities calibrate(IsdaCreditCurveDefinition curveDefinition, MarketData marketData, ImmutableCreditRatesProvider ratesProvider, ReferenceData refData)
{
ArgChecker.isTrue(curveDefinition.CurveValuationDate.Equals(ratesProvider.ValuationDate), "ratesProvider and curveDefinition must be based on the same valuation date");
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
ImmutableList <CdsIsdaCreditCurveNode> curveNodes = curveDefinition.CurveNodes.Where(n => n is CdsIsdaCreditCurveNode).Select(n => (CdsIsdaCreditCurveNode)n).collect(Guavate.toImmutableList());
return(calibrate(curveNodes, curveDefinition.Name, marketData, ratesProvider, curveDefinition.DayCount, curveDefinition.Currency, curveDefinition.ComputeJacobian, curveDefinition.StoreNodeTrade, refData));
}
