public virtual void test_price_presentValue_atExpiry()
{
double df = RATES_PROVIDER_EXPIRY.discountFactor(USD, PAYMENT_DATE);
double forward = PRICER.DiscountingFxSingleProductPricer.forwardFxRate(FX_PRODUCT_HIGH, RATES_PROVIDER_EXPIRY).fxRate(CURRENCY_PAIR);
double priceCallOtm = PRICER.price(CALL_OTM, RATES_PROVIDER_EXPIRY, VOLS_EXPIRY);
CurrencyAmount pvCallOtm = PRICER.presentValue(CALL_OTM, RATES_PROVIDER_EXPIRY, VOLS_EXPIRY);
assertEquals(priceCallOtm, 0d, TOL);
assertEquals(pvCallOtm.Amount, 0d, NOTIONAL * TOL);
double priceCallItm = PRICER.price(CALL_ITM, RATES_PROVIDER_EXPIRY, VOLS_EXPIRY);
CurrencyAmount pvCallItm = PRICER.presentValue(CALL_ITM, RATES_PROVIDER_EXPIRY, VOLS_EXPIRY);
assertEquals(priceCallItm, df * (forward - STRIKE_RATE_LOW), TOL);
assertEquals(pvCallItm.Amount, df * (forward - STRIKE_RATE_LOW) * NOTIONAL, NOTIONAL * TOL);
double pricePutOtm = PRICER.price(PUT_OTM, RATES_PROVIDER_EXPIRY, VOLS_EXPIRY);
CurrencyAmount pvPutOtm = PRICER.presentValue(PUT_OTM, RATES_PROVIDER_EXPIRY, VOLS_EXPIRY);
assertEquals(pricePutOtm, 0d, TOL);
assertEquals(pvPutOtm.Amount, 0d, NOTIONAL * TOL);
double pricePutItm = PRICER.price(PUT_ITM, RATES_PROVIDER_EXPIRY, VOLS_EXPIRY);
CurrencyAmount pvPutItm = PRICER.presentValue(PUT_ITM, RATES_PROVIDER_EXPIRY, VOLS_EXPIRY);
assertEquals(pricePutItm, df * (STRIKE_RATE_HIGH - forward), TOL);
assertEquals(pvPutItm.Amount, df * (STRIKE_RATE_HIGH - forward) * NOTIONAL, NOTIONAL * TOL);
}
public virtual void test_presentValue()
{
CurrencyAmount computed = PRICER.presentValue(NDF, PROVIDER);
double dscUsd = PROVIDER.discountFactor(USD, NDF.PaymentDate);
double dscKrw = PROVIDER.discountFactor(KRW, NDF.PaymentDate);
double expected = NOMINAL_USD * (dscUsd - dscKrw * FX_RATE / PROVIDER.fxRate(CurrencyPair.of(USD, KRW)));
assertEquals(computed.Currency, USD);
assertEquals(computed.Amount, expected, NOMINAL_USD * TOL);
}
/// <summary>
/// Calculates the par spread curve sensitivity.
/// <para>
/// The calculation is based on both of initial and final payments.
/// Thus the number resulting may not be meaningful when deposit has already started and only the final
/// payment remains (no initial payment).
///
/// </para>
/// </summary>
/// <param name="deposit"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the par spread curve sensitivity </returns>
public virtual PointSensitivities parSpreadSensitivity(ResolvedTermDeposit deposit, RatesProvider provider)
{
Currency currency = deposit.Currency;
double accrualFactorInv = 1d / deposit.YearFraction;
double dfStart = provider.discountFactor(currency, deposit.StartDate);
double dfEndInv = 1d / provider.discountFactor(currency, deposit.EndDate);
DiscountFactors discountFactors = provider.discountFactors(currency);
PointSensitivityBuilder sensStart = discountFactors.zeroRatePointSensitivity(deposit.StartDate).multipliedBy(dfEndInv * accrualFactorInv);
PointSensitivityBuilder sensEnd = discountFactors.zeroRatePointSensitivity(deposit.EndDate).multipliedBy(-dfStart * dfEndInv * dfEndInv * accrualFactorInv);
return(sensStart.combinedWith(sensEnd).build());
}
//-------------------------------------------------------------------------
public virtual void test_presentValue_beforeStart()
{
MultiCurrencyAmount computed = PRICER.presentValue(SWAP_PRODUCT, PROVIDER);
double expected_usd = NOMINAL_USD * (PROVIDER.discountFactor(USD, PAYMENT_DATE_NEAR) - PROVIDER.discountFactor(USD, PAYMENT_DATE_FAR));
double expected_krw = NOMINAL_USD * (-FX_RATE * PROVIDER.discountFactor(KRW, PAYMENT_DATE_NEAR) + (FX_RATE + FX_FWD_POINTS) * PROVIDER.discountFactor(KRW, PAYMENT_DATE_FAR));
assertEquals(computed.getAmount(USD).Amount, expected_usd, NOMINAL_USD * TOL);
assertEquals(computed.getAmount(KRW).Amount, expected_krw, NOMINAL_USD * FX_RATE * TOL);
// currency exposure
MultiCurrencyAmount exposure = PRICER.currencyExposure(SWAP_PRODUCT, PROVIDER);
assertEquals(exposure, computed);
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the currency exposure by discounting each payment in its own currency.
/// </summary>
/// <param name="ndf"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the currency exposure </returns>
public virtual MultiCurrencyAmount currencyExposure(ResolvedFxNdf ndf, RatesProvider provider)
{
if (provider.ValuationDate.isAfter(ndf.PaymentDate))
{
return(MultiCurrencyAmount.empty());
}
Currency ccySettle = ndf.SettlementCurrency;
CurrencyAmount notionalSettle = ndf.SettlementCurrencyNotional;
double dfSettle = provider.discountFactor(ccySettle, ndf.PaymentDate);
Currency ccyOther = ndf.NonDeliverableCurrency;
double agreedRate = ndf.AgreedFxRate.fxRate(ccySettle, ccyOther);
double dfOther = provider.discountFactor(ccyOther, ndf.PaymentDate);
return(MultiCurrencyAmount.of(notionalSettle.multipliedBy(dfSettle)).plus(CurrencyAmount.of(ccyOther, -notionalSettle.Amount * agreedRate * dfOther)));
}
//-------------------------------------------------------------------------
public virtual void explainPresentValue(FxResetNotionalExchange @event, RatesProvider provider, ExplainMapBuilder builder)
{
Currency currency = @event.Currency;
LocalDate paymentDate = @event.PaymentDate;
builder.put(ExplainKey.ENTRY_TYPE, "FxResetNotionalExchange");
builder.put(ExplainKey.PAYMENT_DATE, paymentDate);
builder.put(ExplainKey.PAYMENT_CURRENCY, currency);
builder.put(ExplainKey.TRADE_NOTIONAL, @event.NotionalAmount);
if (paymentDate.isBefore(provider.ValuationDate))
{
builder.put(ExplainKey.COMPLETED, true);
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.zero(currency));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.zero(currency));
}
else
{
builder.addListEntry(ExplainKey.OBSERVATIONS, child =>
{
child.put(ExplainKey.ENTRY_TYPE, "FxObservation");
child.put(ExplainKey.INDEX, @event.Observation.Index);
child.put(ExplainKey.FIXING_DATE, @event.Observation.FixingDate);
child.put(ExplainKey.INDEX_VALUE, fxRate(@event, provider));
});
builder.put(ExplainKey.DISCOUNT_FACTOR, provider.discountFactor(currency, paymentDate));
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.of(currency, forecastValue(@event, provider)));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.of(currency, presentValue(@event, provider)));
}
}
//-------------------------------------------------------------------------
public virtual double presentValue(RatePaymentPeriod period, RatesProvider provider)
{
// forecastValue * discountFactor
double df = provider.discountFactor(period.Currency, period.PaymentDate);
return(forecastValue(period, provider) * df);
}
public virtual double pvbp(RatePaymentPeriod paymentPeriod, RatesProvider provider)
{
ArgChecker.isTrue(!paymentPeriod.FxReset.Present, "FX reset is not supported");
int accPeriodCount = paymentPeriod.AccrualPeriods.size();
ArgChecker.isTrue(accPeriodCount == 1 || paymentPeriod.CompoundingMethod.Equals(CompoundingMethod.FLAT), "Only one accrued period or Flat compounding supported");
// no compounding
if (accPeriodCount == 1)
{
RateAccrualPeriod accrualPeriod = paymentPeriod.AccrualPeriods.get(0);
double df = provider.discountFactor(paymentPeriod.Currency, paymentPeriod.PaymentDate);
return(df * accrualPeriod.YearFraction * paymentPeriod.Notional);
}
else
{
// Flat compounding
switch (paymentPeriod.CompoundingMethod)
{
case FLAT:
return(pvbpCompoundedFlat(paymentPeriod, provider));
default:
throw new System.NotSupportedException("PVBP not implemented yet for non FLAT compounding");
}
}
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the present value sensitivity of the swaption product to the rate curves.
/// <para>
/// The present value sensitivity is computed in a "sticky model parameter" style, i.e. the sensitivity to the
/// curve nodes with the SABR model parameters unchanged. This sensitivity does not include a potential
/// re-calibration of the model parameters to the raw market data.
///
/// </para>
/// </summary>
/// <param name="swaption"> the swaption product </param>
/// <param name="ratesProvider"> the rates provider </param>
/// <param name="swaptionVolatilities"> the volatilities </param>
/// <returns> the point sensitivity to the rate curves </returns>
public virtual PointSensitivityBuilder presentValueSensitivityRatesStickyModel(ResolvedSwaption swaption, RatesProvider ratesProvider, SabrSwaptionVolatilities swaptionVolatilities)
{
validate(swaption, ratesProvider, swaptionVolatilities);
ZonedDateTime expiryDateTime = swaption.Expiry;
double expiry = swaptionVolatilities.relativeTime(expiryDateTime);
ResolvedSwap underlying = swaption.Underlying;
ResolvedSwapLeg fixedLeg = this.fixedLeg(underlying);
if (expiry < 0d)
{ // Option has expired already
return(PointSensitivityBuilder.none());
}
double forward = SwapPricer.parRate(underlying, ratesProvider);
ValueDerivatives annuityDerivative = SwapPricer.LegPricer.annuityCashDerivative(fixedLeg, forward);
double annuityCash = annuityDerivative.Value;
double annuityCashDr = annuityDerivative.getDerivative(0);
LocalDate settlementDate = ((CashSwaptionSettlement)swaption.SwaptionSettlement).SettlementDate;
double discountSettle = ratesProvider.discountFactor(fixedLeg.Currency, settlementDate);
double strike = calculateStrike(fixedLeg);
double tenor = swaptionVolatilities.tenor(fixedLeg.StartDate, fixedLeg.EndDate);
double shift = swaptionVolatilities.shift(expiry, tenor);
ValueDerivatives volatilityAdj = swaptionVolatilities.volatilityAdjoint(expiry, tenor, strike, forward);
bool isCall = fixedLeg.PayReceive.Pay;
double shiftedForward = forward + shift;
double shiftedStrike = strike + shift;
double price = BlackFormulaRepository.price(shiftedForward, shiftedStrike, expiry, volatilityAdj.Value, isCall);
double delta = BlackFormulaRepository.delta(shiftedForward, shiftedStrike, expiry, volatilityAdj.Value, isCall);
double vega = BlackFormulaRepository.vega(shiftedForward, shiftedStrike, expiry, volatilityAdj.Value);
PointSensitivityBuilder forwardSensi = SwapPricer.parRateSensitivity(underlying, ratesProvider);
PointSensitivityBuilder discountSettleSensi = ratesProvider.discountFactors(fixedLeg.Currency).zeroRatePointSensitivity(settlementDate);
double sign = swaption.LongShort.sign();
return(forwardSensi.multipliedBy(sign * discountSettle * (annuityCash * (delta + vega * volatilityAdj.getDerivative(0)) + annuityCashDr * price)).combinedWith(discountSettleSensi.multipliedBy(sign * annuityCash * price)));
}
//-------------------------------------------------------------------------
public virtual void explainPresentValue(KnownAmountSwapPaymentPeriod period, RatesProvider provider, ExplainMapBuilder builder)
{
Currency currency = period.Currency;
LocalDate paymentDate = period.PaymentDate;
builder.put(ExplainKey.ENTRY_TYPE, "KnownAmountPaymentPeriod");
builder.put(ExplainKey.PAYMENT_DATE, paymentDate);
builder.put(ExplainKey.PAYMENT_CURRENCY, currency);
builder.put(ExplainKey.START_DATE, period.StartDate);
builder.put(ExplainKey.UNADJUSTED_START_DATE, period.UnadjustedStartDate);
builder.put(ExplainKey.END_DATE, period.EndDate);
builder.put(ExplainKey.UNADJUSTED_END_DATE, period.UnadjustedEndDate);
builder.put(ExplainKey.DAYS, (int)DAYS.between(period.StartDate, period.EndDate));
if (paymentDate.isBefore(provider.ValuationDate))
{
builder.put(ExplainKey.COMPLETED, true);
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.zero(currency));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.zero(currency));
}
else
{
builder.put(ExplainKey.DISCOUNT_FACTOR, provider.discountFactor(currency, paymentDate));
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.of(currency, forecastValue(period, provider)));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.of(currency, presentValue(period, provider)));
}
}
//-------------------------------------------------------------------------
public virtual double presentValue(FxResetNotionalExchange @event, RatesProvider provider)
{
// forecastValue * discountFactor
double df = provider.discountFactor(@event.Currency, @event.PaymentDate);
return(forecastValue(@event, provider) * df);
}
//-------------------------------------------------------------------------
/// <summary>
/// Explains the present value of the FRA product.
/// <para>
/// This returns explanatory information about the calculation.
///
/// </para>
/// </summary>
/// <param name="fra"> the FRA product for which present value should be computed </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the explanatory information </returns>
public virtual ExplainMap explainPresentValue(ResolvedFra fra, RatesProvider provider)
{
ExplainMapBuilder builder = ExplainMap.builder();
Currency currency = fra.Currency;
builder.put(ExplainKey.ENTRY_TYPE, "FRA");
builder.put(ExplainKey.PAYMENT_DATE, fra.PaymentDate);
builder.put(ExplainKey.START_DATE, fra.StartDate);
builder.put(ExplainKey.END_DATE, fra.EndDate);
builder.put(ExplainKey.ACCRUAL_YEAR_FRACTION, fra.YearFraction);
builder.put(ExplainKey.DAYS, (int)DAYS.between(fra.StartDate, fra.EndDate));
builder.put(ExplainKey.PAYMENT_CURRENCY, currency);
builder.put(ExplainKey.NOTIONAL, CurrencyAmount.of(currency, fra.Notional));
builder.put(ExplainKey.TRADE_NOTIONAL, CurrencyAmount.of(currency, fra.Notional));
if (fra.PaymentDate.isBefore(provider.ValuationDate))
{
builder.put(ExplainKey.COMPLETED, true);
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.zero(currency));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.zero(currency));
}
else
{
double rate = rateComputationFn.explainRate(fra.FloatingRate, fra.StartDate, fra.EndDate, provider, builder);
builder.put(ExplainKey.FIXED_RATE, fra.FixedRate);
builder.put(ExplainKey.DISCOUNT_FACTOR, provider.discountFactor(currency, fra.PaymentDate));
builder.put(ExplainKey.PAY_OFF_RATE, rate);
builder.put(ExplainKey.UNIT_AMOUNT, unitAmount(fra, provider));
builder.put(ExplainKey.FORECAST_VALUE, forecastValue(fra, provider));
builder.put(ExplainKey.PRESENT_VALUE, presentValue(fra, provider));
}
return(builder.build());
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the present value of the FRA product.
/// <para>
/// The present value of the product is the value on the valuation date.
/// This is the discounted forecast value.
///
/// </para>
/// </summary>
/// <param name="fra"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the present value of the product </returns>
public virtual CurrencyAmount presentValue(ResolvedFra fra, RatesProvider provider)
{
// forecastValue * discountFactor
double df = provider.discountFactor(fra.Currency, fra.PaymentDate);
double pv = forecastValue0(fra, provider) * df;
return(CurrencyAmount.of(fra.Currency, pv));
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the price of the deliverable swap futures product.
/// <para>
/// The price of the product is the price on the valuation date.
///
/// </para>
/// </summary>
/// <param name="future"> the future </param>
/// <param name="ratesProvider"> the rates provider </param>
/// <returns> the price of the product, in decimal form </returns>
public double price(ResolvedDsf future, RatesProvider ratesProvider)
{
ResolvedSwap swap = future.UnderlyingSwap;
Currency currency = future.Currency;
CurrencyAmount pvSwap = swapPricer.presentValue(swap, currency, ratesProvider);
double df = ratesProvider.discountFactor(currency, future.DeliveryDate);
return(1d + pvSwap.Amount / df);
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the future cash flow of the FRA product.
/// <para>
/// There is only one cash flow on the payment date for the FRA product.
/// The expected currency amount of the cash flow is the same as <seealso cref="#forecastValue(ResolvedFra, RatesProvider)"/>.
///
/// </para>
/// </summary>
/// <param name="fra"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the cash flows </returns>
public virtual CashFlows cashFlows(ResolvedFra fra, RatesProvider provider)
{
LocalDate paymentDate = fra.PaymentDate;
double forecastValue = forecastValue0(fra, provider);
double df = provider.discountFactor(fra.Currency, paymentDate);
CashFlow cashFlow = CashFlow.ofForecastValue(paymentDate, fra.Currency, forecastValue, df);
return(CashFlows.of(cashFlow));
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the par spread.
/// <para>
/// The par spread is the spread that should be added to the FX forward points to have a zero value.
///
/// </para>
/// </summary>
/// <param name="swap"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the spread </returns>
public virtual double parSpread(ResolvedFxSwap swap, RatesProvider provider)
{
Payment counterPaymentNear = swap.NearLeg.CounterCurrencyPayment;
MultiCurrencyAmount pv = presentValue(swap, provider);
double pvCounterCcy = pv.convertedTo(counterPaymentNear.Currency, provider).Amount;
double dfEnd = provider.discountFactor(counterPaymentNear.Currency, swap.FarLeg.PaymentDate);
double notionalBaseCcy = swap.NearLeg.BaseCurrencyPayment.Amount;
return(-pvCounterCcy / (notionalBaseCcy * dfEnd));
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the par spread.
/// <para>
/// This is the spread that should be added to the FX points to have a zero value.
///
/// </para>
/// </summary>
/// <param name="fx"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the spread </returns>
public virtual double parSpread(ResolvedFxSingle fx, RatesProvider provider)
{
Payment basePayment = fx.BaseCurrencyPayment;
Payment counterPayment = fx.CounterCurrencyPayment;
MultiCurrencyAmount pv = presentValue(fx, provider);
double pvCounterCcy = pv.convertedTo(counterPayment.Currency, provider).Amount;
double dfEnd = provider.discountFactor(counterPayment.Currency, fx.PaymentDate);
double notionalBaseCcy = basePayment.Amount;
return(pvCounterCcy / (notionalBaseCcy * dfEnd));
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the price sensitivity of the deliverable swap futures product.
/// <para>
/// The price sensitivity of the product is the sensitivity of the price to the underlying curves.
///
/// </para>
/// </summary>
/// <param name="future"> the future </param>
/// <param name="ratesProvider"> the rates provider </param>
/// <returns> the price curve sensitivity of the product </returns>
public PointSensitivities priceSensitivity(ResolvedDsf future, RatesProvider ratesProvider)
{
ResolvedSwap swap = future.UnderlyingSwap;
Currency currency = future.Currency;
double pvSwap = swapPricer.presentValue(swap, currency, ratesProvider).Amount;
double dfInv = 1d / ratesProvider.discountFactor(currency, future.DeliveryDate);
PointSensitivityBuilder sensiSwapPv = swapPricer.presentValueSensitivity(swap, ratesProvider).multipliedBy(dfInv);
PointSensitivityBuilder sensiDf = ratesProvider.discountFactors(currency).zeroRatePointSensitivity(future.DeliveryDate).multipliedBy(-pvSwap * dfInv * dfInv);
return(sensiSwapPv.combinedWith(sensiDf).build());
}
//-------------------------------------------------------------------------
public virtual void currency_exposure_GBP()
{
LocalDate startDate = LocalDate.of(2016, 8, 2);
LocalDate fixingDate = LocalDate.of(2016, 11, 2);
LocalDate endDate = LocalDate.of(2016, 11, 4);
double yearFraction = 0.25;
double rate = 0.10;
RateAccrualPeriod accrual = RateAccrualPeriod.builder().startDate(startDate).endDate(endDate).yearFraction(yearFraction).rateComputation(FixedRateComputation.of(rate)).build();
double notional = 1000000;
RatePaymentPeriod fixedFx = RatePaymentPeriod.builder().accrualPeriods(accrual).fxReset(FxReset.of(FxIndexObservation.of(FxIndices.GBP_USD_WM, fixingDate, REF_DATA), GBP)).notional(notional).paymentDate(endDate).dayCount(DayCounts.ONE_ONE).currency(USD).build(); // 1_000_000 GBP paid in USD at maturity
PointSensitivityBuilder pts = PERIOD_PRICER.presentValueSensitivity(fixedFx, PROVIDER);
MultiCurrencyAmount ceComputed = PERIOD_PRICER.currencyExposure(fixedFx, PROVIDER);
double dfGbp = PROVIDER.discountFactor(GBP, endDate);
double ceGbpExpected = notional * yearFraction * rate * dfGbp;
assertEquals(ceComputed.getAmount(GBP).Amount, ceGbpExpected, 1.0E-6);
MultiCurrencyAmount ceWithoutPvComputed = PROVIDER.currencyExposure(pts.build().convertedTo(GBP, PROVIDER));
CurrencyAmount pvComputed = CurrencyAmount.of(USD, PERIOD_PRICER.presentValue(fixedFx, PROVIDER));
MultiCurrencyAmount ceComputed2 = ceWithoutPvComputed.plus(pvComputed);
assertEquals(ceComputed2.getAmount(GBP).Amount, ceGbpExpected, TOLERANCE);
assertEquals(ceComputed2.getAmount(USD).Amount, 0.0, TOLERANCE);
}
public virtual void test_presentValue()
{
MultiCurrencyAmount computed = PRICER.presentValue(FWD, PROVIDER);
double expected1 = NOMINAL_USD * PROVIDER.discountFactor(USD, PAYMENT_DATE);
double expected2 = -NOMINAL_USD *FX_RATE *PROVIDER.discountFactor(KRW, PAYMENT_DATE);
assertEquals(computed.getAmount(USD).Amount, expected1, NOMINAL_USD * TOL);
assertEquals(computed.getAmount(KRW).Amount, expected2, NOMINAL_USD * TOL);
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the present value of the Ibor fixing deposit product.
/// <para>
/// The present value of the product is the value on the valuation date.
///
/// </para>
/// </summary>
/// <param name="deposit"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the present value of the product </returns>
public virtual CurrencyAmount presentValue(ResolvedIborFixingDeposit deposit, RatesProvider provider)
{
Currency currency = deposit.Currency;
if (provider.ValuationDate.isAfter(deposit.EndDate))
{
return(CurrencyAmount.of(currency, 0.0d));
}
double forwardRate = this.forwardRate(deposit, provider);
double discountFactor = provider.discountFactor(currency, deposit.EndDate);
double fv = deposit.Notional * deposit.YearFraction * (deposit.FixedRate - forwardRate);
double pv = discountFactor * fv;
return(CurrencyAmount.of(currency, pv));
}
//-------------------------------------------------------------------------
/// <summary>
/// Calculates the present value of the NDF product.
/// <para>
/// The present value of the product is the value on the valuation date.
/// The present value is returned in the settlement currency.
///
/// </para>
/// </summary>
/// <param name="ndf"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the present value of the product in the settlement currency </returns>
public virtual CurrencyAmount presentValue(ResolvedFxNdf ndf, RatesProvider provider)
{
Currency ccySettle = ndf.SettlementCurrency;
if (provider.ValuationDate.isAfter(ndf.PaymentDate))
{
return(CurrencyAmount.zero(ccySettle));
}
Currency ccyOther = ndf.NonDeliverableCurrency;
CurrencyAmount notionalSettle = ndf.SettlementCurrencyNotional;
double agreedRate = ndf.AgreedFxRate.fxRate(ccySettle, ccyOther);
double forwardRate = provider.fxIndexRates(ndf.Index).rate(ndf.Observation, ccySettle);
double dfSettle = provider.discountFactor(ccySettle, ndf.PaymentDate);
return(notionalSettle.multipliedBy(dfSettle * (1d - agreedRate / forwardRate)));
}
//-------------------------------------------------------------------------
public virtual MultiCurrencyAmount currencyExposure(FxResetNotionalExchange @event, RatesProvider provider)
{
LocalDate fixingDate = @event.Observation.FixingDate;
FxIndexRates rates = provider.fxIndexRates(@event.Observation.Index);
double df = provider.discountFactor(@event.Currency, @event.PaymentDate);
if (!fixingDate.isAfter(provider.ValuationDate) && rates.Fixings.get(fixingDate).HasValue)
{
double fxRate = rates.rate(@event.Observation, @event.ReferenceCurrency);
return(MultiCurrencyAmount.of(CurrencyAmount.of(@event.Currency, @event.Notional * df * fxRate)));
}
LocalDate maturityDate = @event.Observation.MaturityDate;
double fxRateSpotSensitivity = rates.FxForwardRates.rateFxSpotSensitivity(@event.ReferenceCurrency, maturityDate);
return(MultiCurrencyAmount.of(CurrencyAmount.of(@event.ReferenceCurrency, @event.Notional * df * fxRateSpotSensitivity)));
}
/// <summary>
/// Calculates the par spread sensitivity to the curves.
/// <para>
/// The sensitivity is reported in the counter currency of the product, but is actually dimensionless.
///
/// </para>
/// </summary>
/// <param name="swap"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the spread curve sensitivity </returns>
public virtual PointSensitivities parSpreadSensitivity(ResolvedFxSwap swap, RatesProvider provider)
{
Payment counterPaymentNear = swap.NearLeg.CounterCurrencyPayment;
MultiCurrencyAmount pv = presentValue(swap, provider);
double pvCounterCcy = pv.convertedTo(counterPaymentNear.Currency, provider).Amount;
double dfEnd = provider.discountFactor(counterPaymentNear.Currency, swap.FarLeg.PaymentDate);
double notionalBaseCcy = swap.NearLeg.BaseCurrencyPayment.Amount;
double ps = -pvCounterCcy / (notionalBaseCcy * dfEnd);
// backward sweep
double psBar = 1d;
double pvCounterCcyBar = -1d / (notionalBaseCcy * dfEnd) * psBar;
double dfEndBar = -ps / dfEnd * psBar;
ZeroRateSensitivity ddfEnddr = provider.discountFactors(counterPaymentNear.Currency).zeroRatePointSensitivity(swap.FarLeg.PaymentDate);
PointSensitivities result = ddfEnddr.multipliedBy(dfEndBar).build();
PointSensitivities dpvdr = presentValueSensitivity(swap, provider);
PointSensitivities dpvdrConverted = dpvdr.convertedTo(counterPaymentNear.Currency, provider);
return(result.combinedWith(dpvdrConverted.multipliedBy(pvCounterCcyBar)));
}
//-------------------------------------------------------------------------
// sensitivity to the spread for a payment period with FLAT compounding type
private double pvbpCompoundedFlat(RatePaymentPeriod paymentPeriod, RatesProvider provider)
{
int nbCmp = paymentPeriod.AccrualPeriods.size();
double[] rate = paymentPeriod.AccrualPeriods.Select(ap => rawRate(ap, provider)).ToArray();
double df = provider.discountFactor(paymentPeriod.Currency, paymentPeriod.PaymentDate);
double rBar = 1.0;
double[] cpaAccumulatedBar = new double[nbCmp + 1];
cpaAccumulatedBar[nbCmp] = paymentPeriod.Notional * df * rBar;
double spreadBar = 0.0d;
for (int j = nbCmp - 1; j >= 0; j--)
{
cpaAccumulatedBar[j] = (1.0d + paymentPeriod.AccrualPeriods.get(j).YearFraction *rate[j] * paymentPeriod.AccrualPeriods.get(j).Gearing) * cpaAccumulatedBar[j + 1];
spreadBar += paymentPeriod.AccrualPeriods.get(j).YearFraction *cpaAccumulatedBar[j + 1];
}
return(spreadBar);
}
//-------------------------------------------------------------------------
public virtual MultiCurrencyAmount currencyExposure(RatePaymentPeriod period, RatesProvider provider)
{
double df = provider.discountFactor(period.Currency, period.PaymentDate);
if (period.FxReset.Present)
{
FxReset fxReset = period.FxReset.get();
LocalDate fixingDate = fxReset.Observation.FixingDate;
FxIndexRates rates = provider.fxIndexRates(fxReset.Observation.Index);
if (!fixingDate.isAfter(provider.ValuationDate) && rates.Fixings.get(fixingDate).HasValue)
{
double fxRate = rates.rate(fxReset.Observation, fxReset.ReferenceCurrency);
return(MultiCurrencyAmount.of(period.Currency, accrualWithNotional(period, period.Notional * fxRate * df, provider)));
}
double fxRateSpotSensitivity = rates.FxForwardRates.rateFxSpotSensitivity(fxReset.ReferenceCurrency, fxReset.Observation.MaturityDate);
return(MultiCurrencyAmount.of(fxReset.ReferenceCurrency, accrualWithNotional(period, period.Notional * fxRateSpotSensitivity * df, provider)));
}
return(MultiCurrencyAmount.of(period.Currency, accrualWithNotional(period, period.Notional * df, provider)));
}
/// <summary>
/// Calculates the present value curve sensitivity of the NDF product.
/// <para>
/// The present value sensitivity of the product is the sensitivity of the present value to
/// the underlying curves.
///
/// </para>
/// </summary>
/// <param name="ndf"> the product </param>
/// <param name="provider"> the rates provider </param>
/// <returns> the point sensitivity of the present value </returns>
public virtual PointSensitivities presentValueSensitivity(ResolvedFxNdf ndf, RatesProvider provider)
{
if (provider.ValuationDate.isAfter(ndf.PaymentDate))
{
return(PointSensitivities.empty());
}
Currency ccySettle = ndf.SettlementCurrency;
Currency ccyOther = ndf.NonDeliverableCurrency;
double notionalSettle = ndf.SettlementNotional;
double agreedRate = ndf.AgreedFxRate.fxRate(ccySettle, ccyOther);
double forwardRate = provider.fxIndexRates(ndf.Index).rate(ndf.Observation, ccySettle);
double dfSettle = provider.discountFactor(ccySettle, ndf.PaymentDate);
double ratio = agreedRate / forwardRate;
double dscBar = (1d - ratio) * notionalSettle;
PointSensitivityBuilder sensiDsc = provider.discountFactors(ccySettle).zeroRatePointSensitivity(ndf.PaymentDate).multipliedBy(dscBar);
double forwardRateBar = dfSettle * notionalSettle * ratio / forwardRate;
PointSensitivityBuilder sensiFx = provider.fxIndexRates(ndf.Index).ratePointSensitivity(ndf.Observation, ccySettle).withCurrency(ccySettle).multipliedBy(forwardRateBar);
return(sensiDsc.combinedWith(sensiFx).build());
}
//-------------------------------------------------------------------------
public virtual void explainPresentValue(RatePaymentPeriod paymentPeriod, RatesProvider provider, ExplainMapBuilder builder)
{
Currency currency = paymentPeriod.Currency;
LocalDate paymentDate = paymentPeriod.PaymentDate;
double fxRate = this.fxRate(paymentPeriod, provider);
double notional = paymentPeriod.Notional * fxRate;
builder.put(ExplainKey.ENTRY_TYPE, "RatePaymentPeriod");
builder.put(ExplainKey.PAYMENT_DATE, paymentDate);
builder.put(ExplainKey.PAYMENT_CURRENCY, currency);
builder.put(ExplainKey.NOTIONAL, CurrencyAmount.of(currency, notional));
builder.put(ExplainKey.TRADE_NOTIONAL, paymentPeriod.NotionalAmount);
if (paymentDate.isBefore(provider.ValuationDate))
{
builder.put(ExplainKey.COMPLETED, true);
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.zero(currency));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.zero(currency));
}
else
{
paymentPeriod.FxReset.ifPresent(fxReset =>
{
builder.addListEntry(ExplainKey.OBSERVATIONS, child =>
{
child.put(ExplainKey.ENTRY_TYPE, "FxObservation");
child.put(ExplainKey.INDEX, fxReset.Observation.Index);
child.put(ExplainKey.FIXING_DATE, fxReset.Observation.FixingDate);
child.put(ExplainKey.INDEX_VALUE, fxRate);
});
});
foreach (RateAccrualPeriod accrualPeriod in paymentPeriod.AccrualPeriods)
{
builder.addListEntry(ExplainKey.ACCRUAL_PERIODS, child => explainPresentValue(accrualPeriod, paymentPeriod.DayCount, currency, notional, provider, child));
}
builder.put(ExplainKey.COMPOUNDING, paymentPeriod.CompoundingMethod);
builder.put(ExplainKey.DISCOUNT_FACTOR, provider.discountFactor(currency, paymentDate));
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.of(currency, forecastValue(paymentPeriod, provider)));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.of(currency, presentValue(paymentPeriod, provider)));
}
}
// sensitivity to the spread for a payment period with FLAT compounding type
private PointSensitivityBuilder pvbpSensitivtyCompoundedFlat(RatePaymentPeriod paymentPeriod, RatesProvider provider)
{
Currency ccy = paymentPeriod.Currency;
int nbCmp = paymentPeriod.AccrualPeriods.size();
double[] rate = paymentPeriod.AccrualPeriods.Select(ap => rawRate(ap, provider)).ToArray();
double df = provider.discountFactor(ccy, paymentPeriod.PaymentDate);
double rB1 = 1.0;
double[] cpaAccumulatedB1 = new double[nbCmp + 1];
cpaAccumulatedB1[nbCmp] = paymentPeriod.Notional * df * rB1;
for (int j = nbCmp - 1; j >= 0; j--)
{
RateAccrualPeriod accrualPeriod = paymentPeriod.AccrualPeriods.get(j);
cpaAccumulatedB1[j] = (1.0d + accrualPeriod.YearFraction * rate[j] * accrualPeriod.Gearing) * cpaAccumulatedB1[j + 1];
}
// backward sweep
double pvbpB2 = 1.0d;
double[] cpaAccumulatedB1B2 = new double[nbCmp + 1];
double[] rateB2 = new double[nbCmp];
for (int j = 0; j < nbCmp; j++)
{
RateAccrualPeriod accrualPeriod = paymentPeriod.AccrualPeriods.get(j);
cpaAccumulatedB1B2[j + 1] += accrualPeriod.YearFraction * pvbpB2;
cpaAccumulatedB1B2[j + 1] += (1.0d + accrualPeriod.YearFraction * rate[j] * accrualPeriod.Gearing) * cpaAccumulatedB1B2[j];
rateB2[j] += accrualPeriod.YearFraction * accrualPeriod.Gearing * cpaAccumulatedB1[j + 1] * cpaAccumulatedB1B2[j];
}
double dfB2 = paymentPeriod.Notional * rB1 * cpaAccumulatedB1B2[nbCmp];
PointSensitivityBuilder dfdr = provider.discountFactors(ccy).zeroRatePointSensitivity(paymentPeriod.PaymentDate);
PointSensitivityBuilder pvbpdr = dfdr.multipliedBy(dfB2);
for (int j = 0; j < nbCmp; j++)
{
RateAccrualPeriod accrualPeriod = paymentPeriod.AccrualPeriods.get(j);
pvbpdr = pvbpdr.combinedWith(rateComputationFn.rateSensitivity(accrualPeriod.RateComputation, accrualPeriod.StartDate, accrualPeriod.EndDate, provider).multipliedBy(rateB2[j]));
}
return(pvbpdr);
}
//-------------------------------------------------------------------------
public virtual void explainPresentValue(NotionalExchange @event, RatesProvider provider, ExplainMapBuilder builder)
{
Currency currency = @event.Currency;
LocalDate paymentDate = @event.PaymentDate;
builder.put(ExplainKey.ENTRY_TYPE, "NotionalExchange");
builder.put(ExplainKey.PAYMENT_DATE, paymentDate);
builder.put(ExplainKey.PAYMENT_CURRENCY, currency);
builder.put(ExplainKey.TRADE_NOTIONAL, @event.PaymentAmount);
if (paymentDate.isBefore(provider.ValuationDate))
{
builder.put(ExplainKey.COMPLETED, true);
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.zero(currency));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.zero(currency));
}
else
{
builder.put(ExplainKey.DISCOUNT_FACTOR, provider.discountFactor(currency, paymentDate));
builder.put(ExplainKey.FORECAST_VALUE, CurrencyAmount.of(currency, forecastValue(@event, provider)));
builder.put(ExplainKey.PRESENT_VALUE, CurrencyAmount.of(currency, presentValue(@event, provider)));
}
}