//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void log_normal_cube()
public virtual void log_normal_cube()
{
double beta = 0.50;
Surface betaSurface = ConstantSurface.of("Beta", beta).withMetadata(DefaultSurfaceMetadata.builder().xValueType(ValueType.YEAR_FRACTION).yValueType(ValueType.YEAR_FRACTION).zValueType(ValueType.SABR_BETA).surfaceName("Beta").build());
double shift = 0.0000;
Surface shiftSurface = ConstantSurface.of("Shift", shift).withMetadata(DefaultSurfaceMetadata.builder().xValueType(ValueType.YEAR_FRACTION).yValueType(ValueType.YEAR_FRACTION).surfaceName("Shift").build());
SabrParametersSwaptionVolatilities calibrated = SABR_CALIBRATION.calibrateWithFixedBetaAndShift(DEFINITION, CALIBRATION_TIME, DATA_SPARSE, MULTICURVE, betaSurface, shiftSurface);
for (int looptenor = 0; looptenor < TENORS.Count; looptenor++)
{
double tenor = TENORS[looptenor].get(ChronoUnit.YEARS);
for (int loopexpiry = 0; loopexpiry < EXPIRIES.Count; loopexpiry++)
{
LocalDate expiry = EUR_FIXED_1Y_EURIBOR_6M.FloatingLeg.StartDateBusinessDayAdjustment.adjust(CALIBRATION_DATE.plus(EXPIRIES[loopexpiry]), REF_DATA);
LocalDate effectiveDate = EUR_FIXED_1Y_EURIBOR_6M.calculateSpotDateFromTradeDate(expiry, REF_DATA);
LocalDate endDate = effectiveDate.plus(TENORS[looptenor]);
SwapTrade swap = EUR_FIXED_1Y_EURIBOR_6M.toTrade(CALIBRATION_DATE, effectiveDate, endDate, BuySell.BUY, 1.0, 0.0);
double parRate = SWAP_PRICER.parRate(swap.resolve(REF_DATA).Product, MULTICURVE);
ZonedDateTime expiryDateTime = expiry.atTime(11, 0).atZone(ZoneId.of("Europe/Berlin"));
double time = calibrated.relativeTime(expiryDateTime);
for (int loopmoney = 0; loopmoney < MONEYNESS.size(); loopmoney++)
{
if (!double.IsNaN(DATA_LOGNORMAL[looptenor][loopexpiry][loopmoney]))
{
double strike = parRate + MONEYNESS.get(loopmoney);
double volBlack = calibrated.volatility(expiryDateTime, tenor, strike, parRate);
double priceComputed = BlackFormulaRepository.price(parRate + shift, parRate + MONEYNESS.get(loopmoney) + shift, time, volBlack, true);
double priceLogNormal = BlackFormulaRepository.price(parRate, parRate + MONEYNESS.get(loopmoney), time, DATA_LOGNORMAL[looptenor][loopexpiry][loopmoney], true);
assertEquals(priceComputed, priceLogNormal, TOLERANCE_PRICE_CALIBRATION_LS);
}
}
}
}
}
//-------------------------------------------------------------------------
/// <summary>
/// Computes the present value of CMS coupon by simple forward rate estimation.
/// </summary>
/// <param name="cmsPeriod"> the CMS </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the present value </returns>
public virtual CurrencyAmount presentValue(CmsPeriod cmsPeriod, RatesProvider provider)
{
Currency ccy = cmsPeriod.Currency;
LocalDate valuationDate = provider.ValuationDate;
if (valuationDate.isAfter(cmsPeriod.PaymentDate))
{
return(CurrencyAmount.zero(ccy));
}
LocalDate fixingDate = cmsPeriod.FixingDate;
double dfPayment = provider.discountFactor(ccy, cmsPeriod.PaymentDate);
if (!fixingDate.isAfter(valuationDate))
{ // Using fixing
double?fixedRate = provider.timeSeries(cmsPeriod.Index).get(fixingDate);
if (fixedRate.HasValue)
{
double payoff = 0d;
switch (cmsPeriod.CmsPeriodType)
{
case CAPLET:
payoff = Math.Max(fixedRate.Value - cmsPeriod.Strike, 0d);
break;
case FLOORLET:
payoff = Math.Max(cmsPeriod.Strike - fixedRate.Value, 0d);
break;
case COUPON:
payoff = fixedRate.Value;
break;
default:
throw new System.ArgumentException("unsupported CMS type");
}
return(CurrencyAmount.of(ccy, payoff * dfPayment * cmsPeriod.Notional * cmsPeriod.YearFraction));
}
else if (fixingDate.isBefore(valuationDate))
{
throw new System.ArgumentException(Messages.format("Unable to get fixing for {} on date {}, no time-series supplied", cmsPeriod.Index, fixingDate));
}
}
if (!cmsPeriod.CmsPeriodType.Equals(CmsPeriodType.COUPON))
{
throw new System.ArgumentException("Unable to price cap or floor in this pricer");
}
// Using forward
ResolvedSwap swap = cmsPeriod.UnderlyingSwap;
double forward = swapPricer.parRate(swap, provider);
return(CurrencyAmount.of(ccy, forward * dfPayment * cmsPeriod.Notional * cmsPeriod.YearFraction));
}
//-------------------------------------------------------------------------
public virtual void test_explainPresentValue()
{
ExplainMap explain = LEG_PRICER.explainPresentValue(CAP_LEG, RATES_PROVIDER, VOLATILITIES);
assertEquals(explain.get(ExplainKey.ENTRY_TYPE).get(), "CmsLeg");
assertEquals(explain.get(ExplainKey.PAY_RECEIVE).get().ToString(), "Receive");
assertEquals(explain.get(ExplainKey.PAYMENT_CURRENCY).get().Code, "EUR");
assertEquals(explain.get(ExplainKey.START_DATE).get(), LocalDate.of(2015, 10, 21));
assertEquals(explain.get(ExplainKey.END_DATE).get(), LocalDate.of(2020, 10, 21));
assertEquals(explain.get(ExplainKey.INDEX).get().ToString(), "EUR-EURIBOR-1100-5Y");
assertEquals(explain.get(ExplainKey.PRESENT_VALUE).get().Amount, 39728.51321029542);
IList <ExplainMap> paymentPeriods = explain.get(ExplainKey.PAYMENT_PERIODS).get();
assertEquals(paymentPeriods.Count, 5);
//Test First Period
ExplainMap cmsPeriod0 = paymentPeriods[0];
assertEquals(cmsPeriod0.get(ExplainKey.ENTRY_TYPE).get(), "CmsCapletPeriod");
assertEquals(cmsPeriod0.get(ExplainKey.STRIKE_VALUE).Value, 0.0125d);
assertEquals(cmsPeriod0.get(ExplainKey.NOTIONAL).get().Amount, 1000000d);
assertEquals(cmsPeriod0.get(ExplainKey.PAYMENT_DATE).get(), LocalDate.of(2016, 10, 21));
assertEquals(cmsPeriod0.get(ExplainKey.DISCOUNT_FACTOR).Value, 0.9820085531995826d);
assertEquals(cmsPeriod0.get(ExplainKey.START_DATE).get(), LocalDate.of(2015, 10, 21));
assertEquals(cmsPeriod0.get(ExplainKey.END_DATE).get(), LocalDate.of(2016, 10, 21));
assertEquals(cmsPeriod0.get(ExplainKey.FIXING_DATE).get(), LocalDate.of(2015, 10, 19));
assertEquals(cmsPeriod0.get(ExplainKey.ACCRUAL_YEAR_FRACTION).Value, 1.0166666666666666d);
double forwardSwapRate = PRICER_SWAP.parRate(CAP_LEG.CmsPeriods.get(0).UnderlyingSwap, RATES_PROVIDER);
assertEquals(cmsPeriod0.get(ExplainKey.FORWARD_RATE).Value, forwardSwapRate);
CurrencyAmount pv = PERIOD_PRICER.presentValue(CAP_LEG.CmsPeriods.get(0), RATES_PROVIDER, VOLATILITIES);
assertEquals(cmsPeriod0.get(ExplainKey.PRESENT_VALUE).get(), pv);
}
//-------------------------------------------------------------------------
public virtual void test_presentValue()
{
CurrencyAmount computedRec = SWAPTION_PRICER.presentValue(SWAPTION_REC_LONG, RATE_PROVIDER, VOLS);
CurrencyAmount computedPay = SWAPTION_PRICER.presentValue(SWAPTION_PAY_SHORT, RATE_PROVIDER, VOLS);
double forward = SWAP_PRICER.parRate(RSWAP_REC, RATE_PROVIDER);
double pvbp = SWAP_PRICER.LegPricer.pvbp(RSWAP_REC.getLegs(SwapLegType.FIXED).get(0), RATE_PROVIDER);
double volatility = VOLS.volatility(SWAPTION_REC_LONG.Expiry, TENOR_YEAR, RATE, forward);
double maturity = VOLS.relativeTime(SWAPTION_REC_LONG.Expiry);
double expectedRec = pvbp * BlackFormulaRepository.price(forward + SwaptionSabrRateVolatilityDataSet.SHIFT, RATE + SwaptionSabrRateVolatilityDataSet.SHIFT, maturity, volatility, false);
double expectedPay = -pvbp *BlackFormulaRepository.price(forward + SwaptionSabrRateVolatilityDataSet.SHIFT, RATE + SwaptionSabrRateVolatilityDataSet.SHIFT, maturity, volatility, true);
assertEquals(computedRec.Currency, USD);
assertEquals(computedRec.Amount, expectedRec, NOTIONAL * TOL);
assertEquals(computedPay.Currency, USD);
assertEquals(computedPay.Amount, expectedPay, NOTIONAL * TOL);
}
public virtual void test_presentValue()
{
CurrencyAmount computedRec = PRICER.presentValue(SWAPTION_REC_LONG, RATE_PROVIDER, VOLS);
CurrencyAmount computedPay = PRICER.presentValue(SWAPTION_PAY_SHORT, RATE_PROVIDER, VOLS);
double forward = SWAP_PRICER.parRate(RSWAP_REC, RATE_PROVIDER);
double annuityCash = SWAP_PRICER.LegPricer.annuityCash(RFIXED_LEG_REC, forward);
double expiry = VOLS.relativeTime(SWAPTION_REC_LONG.Expiry);
double tenor = VOLS.tenor(SETTLE, END);
double volatility = SURFACE.zValue(expiry, tenor);
double settle = ACT_ACT_ISDA.relativeYearFraction(VAL_DATE, SETTLE);
double df = Math.Exp(-DSC_CURVE.yValue(settle) * settle);
double expectedRec = df * annuityCash * BlackFormulaRepository.price(forward, RATE, expiry, volatility, false);
double expectedPay = -df *annuityCash *BlackFormulaRepository.price(forward, RATE, expiry, volatility, true);
assertEquals(computedRec.Currency, EUR);
assertEquals(computedRec.Amount, expectedRec, NOTIONAL * TOL);
assertEquals(computedPay.Currency, EUR);
assertEquals(computedPay.Amount, expectedPay, NOTIONAL * TOL);
}
//-------------------------------------------------------------------------
public virtual void test_implied_volatility()
{
double forward = PRICER_SWAP.parRate(RSWAP_REC, MULTI_USD);
double volExpected = BLACK_VOLS_USD_STD.volatility(SWAPTION_LONG_REC.Expiry, SWAP_TENOR_YEAR, STRIKE, forward);
double volComputed = PRICER_SWAPTION_BLACK.impliedVolatility(SWAPTION_LONG_PAY, MULTI_USD, BLACK_VOLS_USD_STD);
assertEquals(volComputed, volExpected, TOLERANCE_RATE);
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the present value of the swaption.
/// <para>
/// The result is expressed using the currency of the swaption.
///
/// </para>
/// </summary>
/// <param name="swaption"> the swaption </param>
/// <param name="ratesProvider"> the rates provider </param>
/// <param name="swaptionVolatilities"> the volatilities </param>
/// <returns> the present value </returns>
public virtual CurrencyAmount presentValue(ResolvedSwaption swaption, RatesProvider ratesProvider, SwaptionVolatilities swaptionVolatilities)
{
validate(swaption, ratesProvider, swaptionVolatilities);
double expiry = swaptionVolatilities.relativeTime(swaption.Expiry);
ResolvedSwap underlying = swaption.Underlying;
ResolvedSwapLeg fixedLeg = this.fixedLeg(underlying);
if (expiry < 0d)
{ // Option has expired already
return(CurrencyAmount.of(fixedLeg.Currency, 0d));
}
double forward = swapPricer.parRate(underlying, ratesProvider);
double numeraire = calculateNumeraire(swaption, fixedLeg, forward, ratesProvider);
double strike = calculateStrike(fixedLeg);
double tenor = swaptionVolatilities.tenor(fixedLeg.StartDate, fixedLeg.EndDate);
double volatility = swaptionVolatilities.volatility(expiry, tenor, strike, forward);
PutCall putCall = PutCall.ofPut(fixedLeg.PayReceive.Receive);
double price = numeraire * swaptionVolatilities.price(expiry, tenor, putCall, strike, forward, volatility);
return(CurrencyAmount.of(fixedLeg.Currency, price * swaption.LongShort.sign()));
}
//-----------------------------------------------------------------------
public virtual void test_VanillaFixedVsLibor3mSwap()
{
SwapLeg payLeg = fixedLeg(LocalDate.of(2014, 9, 12), LocalDate.of(2021, 9, 12), P6M, PAY, NOTIONAL, 0.015, null);
SwapLeg receiveLeg = iborLeg(LocalDate.of(2014, 9, 12), LocalDate.of(2021, 9, 12), USD_LIBOR_3M, RECEIVE, NOTIONAL, null);
ResolvedSwapTrade trade = SwapTrade.builder().info(TradeInfo.builder().tradeDate(LocalDate.of(2014, 9, 10)).build()).product(Swap.of(payLeg, receiveLeg)).build().resolve(REF_DATA);
// test pv
DiscountingSwapTradePricer pricer = swapPricer();
CurrencyAmount pv = pricer.presentValue(trade, provider()).getAmount(USD);
assertEquals(pv.Amount, 7170391.798257509, TOLERANCE_PV);
// test par rate
double parRate = PRICER_PRODUCT.parRate(trade.Product, provider());
assertEquals(parRate, 0.02589471566819517, TOLERANCE_RATE);
// test par rate vs pv
ResolvedSwap swapPV0 = Swap.of(fixedLeg(LocalDate.of(2014, 9, 12), LocalDate.of(2021, 9, 12), P6M, PAY, NOTIONAL, parRate, null), receiveLeg).resolve(REF_DATA);
CurrencyAmount pv0 = PRICER_PRODUCT.presentValue(swapPV0, provider()).getAmount(USD);
assertEquals(pv0.Amount, 0, TOLERANCE_PV); // PV at par rate should be 0
}
//-------------------------------------------------------------------------
public virtual void test_presentValue()
{
CurrencyAmount pvRecComputed = PRICER_SWAPTION.presentValue(SWAPTION_REC_LONG, RATE_PROVIDER, VOLS);
CurrencyAmount pvPayComputed = PRICER_SWAPTION.presentValue(SWAPTION_PAY_SHORT, RATE_PROVIDER, VOLS);
double forward = PRICER_SWAP.parRate(RSWAP_REC, RATE_PROVIDER);
double annuityCash = PRICER_SWAP.LegPricer.annuityCash(RSWAP_REC.getLegs(SwapLegType.FIXED).get(0), forward);
double volatility = VOLS.volatility(SWAPTION_REC_LONG.Expiry, SWAP_TENOR_YEAR, STRIKE, forward);
double discount = RATE_PROVIDER.discountFactor(USD, SETTLE_DATE);
NormalFunctionData normalData = NormalFunctionData.of(forward, annuityCash * discount, volatility);
double expiry = VOLS.relativeTime(SWAPTION_REC_LONG.Expiry);
EuropeanVanillaOption optionRec = EuropeanVanillaOption.of(STRIKE, expiry, PutCall.PUT);
EuropeanVanillaOption optionPay = EuropeanVanillaOption.of(STRIKE, expiry, PutCall.CALL);
double pvRecExpected = NORMAL.getPriceFunction(optionRec).apply(normalData);
double pvPayExpected = -NORMAL.getPriceFunction(optionPay).apply(normalData);
assertEquals(pvRecComputed.Currency, USD);
assertEquals(pvRecComputed.Amount, pvRecExpected, NOTIONAL * TOL);
assertEquals(pvPayComputed.Currency, USD);
assertEquals(pvPayComputed.Amount, pvPayExpected, NOTIONAL * TOL);
}
//-------------------------------------------------------------------------
/// <summary>
/// Runs the calibration of swaptions and print the calibrated smile results on the console.
/// </summary>
/// <param name="args"> -s to use the sparse data, i.e. a cube with missing data points </param>
public static void Main(string[] args)
{
// select data
TenorRawOptionData data = DATA_FULL;
if (args.Length > 0)
{
if (args[0].Equals("-s"))
{
data = DATA_SPARSE;
}
}
Console.WriteLine("Start calibration");
double beta = 0.50;
SurfaceMetadata betaMetadata = DefaultSurfaceMetadata.builder().xValueType(ValueType.YEAR_FRACTION).yValueType(ValueType.YEAR_FRACTION).zValueType(ValueType.SABR_BETA).surfaceName("Beta").build();
Surface betaSurface = ConstantSurface.of(betaMetadata, beta);
double shift = 0.0300;
Surface shiftSurface = ConstantSurface.of("Shift", shift);
SabrParametersSwaptionVolatilities calibrated = SABR_CALIBRATION.calibrateWithFixedBetaAndShift(DEFINITION, CALIBRATION_TIME, data, MULTICURVE, betaSurface, shiftSurface);
Console.WriteLine("End calibration");
/* Graph calibration */
int nbStrikesGraph = 50;
double moneyMin = -0.0250;
double moneyMax = +0.0300;
double[] moneyGraph = new double[nbStrikesGraph + 1];
for (int i = 0; i < nbStrikesGraph + 1; i++)
{
moneyGraph[i] = moneyMin + i * (moneyMax - moneyMin) / nbStrikesGraph;
}
//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[][][] strikesGraph = new double[NB_TENORS][NB_EXPIRIES][nbStrikesGraph + 1];
double[][][] strikesGraph = RectangularArrays.ReturnRectangularDoubleArray(NB_TENORS, NB_EXPIRIES, nbStrikesGraph + 1);
//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[][][] volLNGraph = new double[NB_TENORS][NB_EXPIRIES][nbStrikesGraph + 1];
double[][][] volLNGraph = RectangularArrays.ReturnRectangularDoubleArray(NB_TENORS, NB_EXPIRIES, nbStrikesGraph + 1);
//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[][][] volNGraph = new double[NB_TENORS][NB_EXPIRIES][nbStrikesGraph + 1];
double[][][] volNGraph = RectangularArrays.ReturnRectangularDoubleArray(NB_TENORS, NB_EXPIRIES, nbStrikesGraph + 1);
//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[][] parRate = new double[NB_TENORS][NB_EXPIRIES];
double[][] parRate = RectangularArrays.ReturnRectangularDoubleArray(NB_TENORS, NB_EXPIRIES);
for (int looptenor = 0; looptenor < TENORS.size(); looptenor++)
{
double tenor = TENORS.get(looptenor).get(ChronoUnit.YEARS);
for (int loopexpiry = 0; loopexpiry < EXPIRIES.size(); loopexpiry++)
{
LocalDate expiry = EUR_FIXED_1Y_EURIBOR_6M.FloatingLeg.StartDateBusinessDayAdjustment.adjust(CALIBRATION_DATE.plus(EXPIRIES.get(loopexpiry)), REF_DATA);
LocalDate effectiveDate = EUR_FIXED_1Y_EURIBOR_6M.calculateSpotDateFromTradeDate(expiry, REF_DATA);
LocalDate endDate = effectiveDate.plus(TENORS.get(looptenor));
SwapTrade swap = EUR_FIXED_1Y_EURIBOR_6M.toTrade(CALIBRATION_DATE, effectiveDate, endDate, BuySell.BUY, 1.0, 0.0);
parRate[looptenor][loopexpiry] = SWAP_PRICER.parRate(swap.resolve(REF_DATA).Product, MULTICURVE);
ZonedDateTime expiryDateTime = expiry.atTime(11, 0).atZone(ZoneId.of("Europe/Berlin"));
double time = calibrated.relativeTime(expiryDateTime);
for (int i = 0; i < nbStrikesGraph + 1; i++)
{
strikesGraph[looptenor][loopexpiry][i] = parRate[looptenor][loopexpiry] + moneyGraph[i];
volLNGraph[looptenor][loopexpiry][i] = calibrated.volatility(expiryDateTime, tenor, strikesGraph[looptenor][loopexpiry][i], parRate[looptenor][loopexpiry]);
volNGraph[looptenor][loopexpiry][i] = NormalFormulaRepository.impliedVolatilityFromBlackApproximated(parRate[looptenor][loopexpiry] + shift, strikesGraph[looptenor][loopexpiry][i] + shift, time, volLNGraph[looptenor][loopexpiry][i]);
}
}
}
/* Graph export */
string svn = "Moneyness";
for (int looptenor = 0; looptenor < TENORS.size(); looptenor++)
{
for (int loopexpiry = 0; loopexpiry < EXPIRIES.size(); loopexpiry++)
{
svn = svn + ", Strike_" + EXPIRIES.get(loopexpiry).ToString() + "x" + TENORS.get(looptenor).ToString() + ", NormalVol_" + EXPIRIES.get(loopexpiry).ToString() + "x" + TENORS.get(looptenor).ToString();
}
}
svn = svn + "\n";
for (int i = 0; i < nbStrikesGraph + 1; i++)
{
svn = svn + moneyGraph[i];
for (int looptenor = 0; looptenor < TENORS.size(); looptenor++)
{
for (int loopexpiry = 0; loopexpiry < EXPIRIES.size(); loopexpiry++)
{
svn = svn + ", " + strikesGraph[looptenor][loopexpiry][i];
svn = svn + ", " + volNGraph[looptenor][loopexpiry][i];
}
}
svn = svn + "\n";
}
Console.WriteLine(svn);
}
//-------------------------------------------------------------------------
/// <summary>
/// Computes the present value by replication in SABR framework with extrapolation on the right.
/// </summary>
/// <param name="cmsPeriod"> the CMS </param>
/// <param name="provider"> the rates provider </param>
/// <param name="swaptionVolatilities"> the swaption volatilities </param>
/// <returns> the present value </returns>
public CurrencyAmount presentValue(CmsPeriod cmsPeriod, RatesProvider provider, SwaptionVolatilities swaptionVolatilities)
{
Currency ccy = cmsPeriod.Currency;
LocalDate valuationDate = provider.ValuationDate;
if (valuationDate.isAfter(cmsPeriod.PaymentDate))
{
return(CurrencyAmount.zero(ccy));
}
LocalDate fixingDate = cmsPeriod.FixingDate;
double dfPayment = provider.discountFactor(ccy, cmsPeriod.PaymentDate);
if (!fixingDate.isAfter(valuationDate))
{ // Using fixing
double?fixedRate = provider.timeSeries(cmsPeriod.Index).get(fixingDate);
if (fixedRate.HasValue)
{
double payoff = 0d;
switch (cmsPeriod.CmsPeriodType)
{
case CAPLET:
payoff = Math.Max(fixedRate.Value - cmsPeriod.Strike, 0d);
break;
case FLOORLET:
payoff = Math.Max(cmsPeriod.Strike - fixedRate.Value, 0d);
break;
case COUPON:
payoff = fixedRate.Value;
break;
default:
throw new System.ArgumentException("unsupported CMS type");
}
return(CurrencyAmount.of(ccy, payoff * dfPayment * cmsPeriod.Notional * cmsPeriod.YearFraction));
}
else if (fixingDate.isBefore(valuationDate))
{
throw new System.ArgumentException(Messages.format("Unable to get fixing for {} on date {}, no time-series supplied", cmsPeriod.Index, fixingDate));
}
}
if (!cmsPeriod.CmsPeriodType.Equals(CmsPeriodType.COUPON))
{
throw new System.ArgumentException("Unable to price cap or floor in this pricer");
}
// Using forward
SwapIndex index = cmsPeriod.Index;
ResolvedSwap swap = cmsPeriod.UnderlyingSwap;
ResolvedSwapLeg fixedLeg = swap.getLegs(SwapLegType.FIXED).get(0);
int nbFixedPaymentYear = (int)(long)Math.Round(1d / ((RatePaymentPeriod)fixedLeg.PaymentPeriods.get(0)).AccrualPeriods.get(0).YearFraction, MidpointRounding.AwayFromZero);
int nbFixedPeriod = fixedLeg.PaymentPeriods.size();
double forward = swapPricer.parRate(swap, provider);
double tenor = swaptionVolatilities.tenor(swap.StartDate, swap.EndDate);
double expiryTime = swaptionVolatilities.relativeTime(fixingDate.atTime(index.FixingTime).atZone(index.FixingZone));
double volatility = swaptionVolatilities.volatility(expiryTime, tenor, forward, forward);
ValueDerivatives annuityDerivatives = swapPricer.LegPricer.annuityCash2(nbFixedPaymentYear, nbFixedPeriod, volatility);
double forwardAdjustment = -0.5 * forward * forward * volatility * volatility * expiryTime * annuityDerivatives.getDerivative(1) / annuityDerivatives.getDerivative(0);
return(CurrencyAmount.of(ccy, (forward + forwardAdjustment) * dfPayment * cmsPeriod.Notional * cmsPeriod.YearFraction));
}