/// <summary>
/// Get price factors.
/// </summary>
private void PreValue(PriceFactorList factors)
{
var deal = (CalendarSpreadOption)Deal;
// Get forward price samples.
fForwardSample = factors.Get <ForwardPriceSample>(deal.Sampling_Type);
// Get ReferencePrice price factors.
fReferencePrice1 = factors.GetInterface <IReferencePrice>(deal.Reference_Type);
fReferencePrice2 = factors.GetInterface <IReferencePrice>(deal.Reference_Type);
// Get ReferenceVol price factors.
// Default to Reference Type if Reference Vol Type is not set.
if (string.IsNullOrEmpty(deal.Reference_Vol_Type))
{
fReferenceVol1 = factors.Get <ReferenceVol>(deal.Reference_Type);
fReferenceVol2 = factors.Get <ReferenceVol>(deal.Reference_Type);
}
else
{
fReferenceVol1 = factors.Get <ReferenceVol>(deal.Reference_Vol_Type);
fReferenceVol2 = factors.Get <ReferenceVol>(deal.Reference_Vol_Type);
}
// Get correlation price factor based on the ID of the forward price.
fCorrelations = factors.Get <ForwardPriceCorrelations>(fReferencePrice1.GetForwardPrice());
// Get FX rate price factors.
fFxRate = factors.GetInterface <IFxRate>(deal.Currency);
fFxPayoffRate = factors.GetInterface <IFxRate>(deal.DealCurrency());
fPriceFactorFxRate = factors.GetInterface <IFxRate>(fReferencePrice1.DomesticCurrency());
// Get discount rate price factor.
fDiscountRate = factors.GetInterface <IInterestRate>(InterestRateUtils.GetRateId(deal.Discount_Rate, deal.Currency));
}
/// <summary>
/// Prepare for valuation anything that is dependent upon the scenario.
/// </summary>
public override void PreValue(PriceFactorList factors)
{
base.PreValue(factors);
CFFixedInterestListDeal deal = (CFFixedInterestListDeal)fDeal;
// Get factor for translation from rate currency to settlement currency for cashflows with FX reset date
if (!string.IsNullOrEmpty(deal.Rate_Currency) && deal.Rate_Currency != fCurrency)
{
fRateFxRate = factors.GetInterface <IFxRate>(deal.Rate_Currency);
}
}
/// <summary>
/// Prepare for valuation.
/// </summary>
public override void PreValue(PriceFactorList factors)
{
var deal = (CFFloatingInterestListDeal)Deal;
base.PreValue(factors);
bool quanto = fForecastIsForeign && fCharacteristics.HasQuanto && Quanto_Correction == YesNo.Yes;
bool convexity = !fCharacteristics.IsStandardLibor && Convexity_Correction == YesNo.Yes;
// volatility surfaces for forecast rate
if (fCharacteristics.HasCms)
{
fForecastYieldVol = InterestVolBase.GetYieldVol(factors, deal.Forecast_Rate_Swaption_Volatility, fForecastCurrency);
}
if (fCharacteristics.HasLibor && (fCharacteristics.HasOptionlet || convexity || quanto))
{
fForecastRateVol = InterestVolBase.GetRateVol(factors, deal.Forecast_Rate_Cap_Volatility, fForecastCurrency);
}
// volatility surfaces for discount rate
if (convexity)
{
// Discount rate volatility and correlation for convexity correction
if (fCharacteristics.HasCms)
{
fDiscountYieldVol = InterestVolBase.GetYieldVol(factors, deal.Discount_Rate_Swaption_Volatility, fCurrency);
}
if (fCharacteristics.HasLibor)
{
fDiscountRateVol = InterestVolBase.GetRateVol(factors, deal.Discount_Rate_Cap_Volatility, fCurrency);
}
}
if (fForecastIsForeign)
{
// Get factor for translation from forecast rate currency to settlement currency for cashflows with FX reset date
if (fCharacteristics.HasFXReset)
{
fForecastFxRate = factors.GetInterface <IFxRate>(fForecastCurrency);
}
if (quanto)
{
fForecastFxVol = FXVolHelper.Get(factors, fForecastCurrency, fCurrency);
fForecastFxCorrel = CorrelationHelper.Get(factors, typeof(InterestRate), fForecastCurrency, null, typeof(FxRate), fForecastCurrency, fCurrency);
fForecastDiscountCorrel = CorrelationHelper.Get(factors, typeof(InterestRate), fForecastCurrency, null, typeof(InterestRate), fCurrency, null);
}
}
}
/// <summary>
/// Constructor.
/// </summary>
public CreditValuationParameters(DealCreditBase deal, CreditBaseValuation valuation, PriceFactorList factors, VectorScopedCache.Scope cache)
{
DF = DiscountRate.Get(factors, InterestRateUtils.GetRateId(deal.Discount_Rate, deal.Currency));
X = factors.GetInterface <IFxRate>(deal.Currency);
SP = factors.GetInterface <ISurvivalProb>(string.IsNullOrEmpty(deal.Survival_Probability) ? deal.Name : deal.Survival_Probability);
RR = null;
CR = null;
DefaultTime = null;
Weights = null;
NamesDefaultedBeforeBaseDate = null;
if (valuation.Respect_Default == YesNo.Yes)
{
List <string> names = new List <string>();
if (deal.ProtectionReferenceType() == DealCreditBase.ReferenceType.Single_Name)
{
names.Add(deal.Name);
Weights = new double[] { 1.0 };
}
else
{
IndexCDSPool indexCds = factors.Get <IndexCDSPool>(deal.Name);
Weights = new double[indexCds.Names.Count];
for (int i = 0; i < indexCds.Names.Count; ++i)
{
names.Add(indexCds.Names[i].Name);
Weights[i] = indexCds.Names[i].Weight;
}
}
if (valuation.RequiresRecoveryOnDefault())
{
RR = new RecoveryRate[names.Count];
for (int i = 0; i < names.Count; ++i)
{
RR[i] = factors.Get <RecoveryRate>(string.IsNullOrEmpty(deal.Recovery_Rate) ? names[i] : deal.Recovery_Rate);
}
}
CR = new CreditRating[names.Count];
NamesDefaultedBeforeBaseDate = new bool[names.Count];
DefaultTime = new Vector[names.Count];
for (int i = 0; i < names.Count; ++i)
{
DefaultTime[i] = cache.Get();
CR[i] = factors.Get <CreditRating>(names[i]);
NamesDefaultedBeforeBaseDate[i] = CreditRating.DefaultedBeforeBaseDate(CR[i], factors.BaseDate);
CR[i].DefaultTime(DefaultTime[i]);
}
}
}
/// <inheritdoc />
public void PreValue(PriceFactorList factors)
{
var deal = (SwaptionDeal)Deal;
var discountId = InterestRateUtils.GetRateId(deal.Discount_Rate, deal.Currency);
var forecastId = InterestRateUtils.GetRateId(deal.Forecast_Rate, discountId);
fModelParameters = factors.Get <HullWhite1FactorModelParameters>(fModelParametersId);
fFxRate = factors.GetInterface <IFxRate>(deal.Currency);
fDiscountRate = DiscountRate.Get(factors, discountId);
fForecastRate = factors.GetInterface <IInterestRate>(forecastId);
fQuadrature = new Lazy <GaussHermiteNormalQuadrature>(() => new GaussHermiteNormalQuadrature(30));
}
/// <summary>
/// Calculate a valuation profile for a range of scenarios.
/// </summary>
public override void Value(ValuationResults valuationResults, PriceFactorList factors, BaseTimeGrid baseTimes)
{
IAssetPrice price = GetAssetPrice(factors);
PVProfiles result = valuationResults.Profile;
double scale = fDeal.Units * (fDeal.Buy_Sell == BuySell.Buy ? +1 : -1);
var tgi = new TimeGridIterator(fT);
VectorEngine.For(tgi, () => result.AppendVector(tgi.Date, scale * price.Get(tgi.T)));
result.Complete(fT);
CashAccumulators cashAccumulators = valuationResults.Cash;
double endDate = Deal.EndDate();
if (!cashAccumulators.Ignore && endDate <= fT.fHorizon)
{
double tEnd = CalcUtils.DaysToYears(endDate - factors.BaseDate);
IFxRate fxRate = factors.GetInterface <IFxRate>(fDeal.Currency);
cashAccumulators.Accumulate(fxRate, endDate, scale * price.Get(tEnd) / fxRate.Get(tEnd));
}
}
/// <summary>
/// Prepare for valuation.
/// </summary>
public override void PreValue(PriceFactorList factors)
{
base.PreValue(factors);
var deal = (CFEquityFloatingInterestListDeal)Deal;
deal.GetDealHelper().PreValueAsset(out fEquity, out fEquityVol, ref fEquityQuantoCompo, factors);
// Get FX rate price factors
fEquityCurrency = deal.Equity_Currency;
fEquityPayoffCurrency = string.IsNullOrEmpty(deal.Equity_Payoff_Currency) ? fEquityCurrency : deal.Equity_Payoff_Currency;
fEquityFXRate = factors.GetInterface <IFxRate>(fEquityCurrency);
fEquityPayoffFXRate = fEquityPayoffCurrency != fEquityCurrency?factors.GetInterface <IFxRate>(fEquityPayoffCurrency) : fEquityFXRate;
bool quanto = fForecastIsForeign && Quanto_Correction == YesNo.Yes;
if (fCharacteristics.fHasLibor)
{
// volatility surfaces for forecast rate
if ((!fCharacteristics.fIsStandardLibor && Convexity_Correction == YesNo.Yes) || quanto)
{
fForecastRateVol = InterestVolBase.GetRateVol(factors, deal.Forecast_Rate_Cap_Volatility, fForecastCurrency);
}
// volatility surfaces for discount rate
if (!fCharacteristics.fIsStandardLibor && Convexity_Correction == YesNo.Yes)
{
fDiscountRateVol = InterestVolBase.GetRateVol(factors, deal.Discount_Rate_Cap_Volatility, fCurrency);
}
}
if (quanto)
{
fForecastFXVol = FXVolHelper.Get(factors, fForecastCurrency, fCurrency);
fForecastFXCorrel = CorrelationHelper.Get(factors, typeof(InterestRate), fForecastCurrency, null, typeof(FxRate), fForecastCurrency, fCurrency);
fForecastDiscountCorrel = CorrelationHelper.Get(factors, typeof(InterestRate), fForecastCurrency, null, typeof(InterestRate), fCurrency, null);
}
}
private static decimal getSpread(IFxRate rate)
{
return Math.Round(rate.Offer - rate.Bid, 4);
}
private static decimal getDelta(IFxRate rate)
{
return Math.Round(rate.Offer - rate.PreviousOffer, 4);
}
/// <summary>
/// Value the deal from given base date, price factors and time grid.
/// </summary>
public void Value(PVProfiles pvResults, CashAccumulators cashResults, double baseDate, IInterestRate discountRate, IInterestRate forecastRate1, IInterestRate forecastRate2, IFxRate fxRate, TimeGrid timeGrid, int numScenarios)
{
var tgi = new TimeGridIterator(timeGrid);
var deal = (FloatingInterestCashflowInterpolatedDeal)Deal;
bool hasRate1 = deal.HasRate1();
bool hasRate2 = deal.HasRate2();
double scale = deal.Buy_Sell == BuySell.Buy ? +deal.Principal : -deal.Principal;
double tPay = CalcUtils.DaysToYears(fPaymentDate - baseDate);
double tReset = CalcUtils.DaysToYears(deal.Reset_Date - baseDate);
double tRateStart = CalcUtils.DaysToYears(deal.Rate_Start_Date - baseDate);
double tRateEnd1 = hasRate1 ? CalcUtils.DaysToYears(fRate1EndDate - baseDate) : 0.0;
double tRateEnd2 = hasRate2 ? CalcUtils.DaysToYears(fRate2EndDate - baseDate) : 0.0;
double tRateEnd12 = tRateEnd2 - tRateEnd1; // Time from rate 1 end date to rate 2 end date.
double tAccrualEnd = CalcUtils.DaysToYears(deal.Accrual_End_Date - baseDate);
double interpCoefficient = Math.Abs(tRateEnd12) >= CalcUtils.MinTime ? (tAccrualEnd - tRateEnd1) / tRateEnd12 : 0.0; // Coefficient used to calculate interpolated rate.
VectorEngine.For(tgi, () =>
{
using (var cache = Vector.Cache(numScenarios))
{
Vector pv = cache.Get();
if (tgi.Date <= fPaymentDate && fPaymentDate > fCutoffDate)
{
Vector interpRate = cache.GetClear();
Vector rate1 = cache.GetClear();
Vector rate2 = cache.GetClear();
if (hasRate1)
{
if (fKnownResetRate1.HasValue)
{
rate1.Assign(fKnownResetRate1.Value);
}
else
{
InterestRateUtils.LiborRate(rate1, forecastRate1, tgi.T, tReset, tRateStart, tRateEnd1, fRate1YearFraction);
}
}
if (hasRate2)
{
if (fKnownResetRate2.HasValue)
{
rate2.Assign(fKnownResetRate2.Value);
}
else
{
InterestRateUtils.LiborRate(rate2, forecastRate2, tgi.T, tReset, tRateStart, tRateEnd2, fRate2YearFraction);
}
}
if (hasRate1 && hasRate2)
{
if (Math.Abs(tRateEnd12) >= CalcUtils.MinTime)
{
interpRate.Assign(rate1 + interpCoefficient * (rate2 - rate1));
}
else
{
interpRate.Assign(0.5 * rate1 + 0.5 * rate2);
}
}
else
{
interpRate.Assign(hasRate1 ? rate1 : rate2);
}
// Round the calculated rate, regardless whether the valuation date is before or after the reset date.
CFFloatingInterestList.RoundRateTo(deal.Interpolated_Rate_Rounding, interpRate);
pv.Assign(scale * (interpRate + deal.Margin) * fAccrualYearFraction);
CFFixedList.RoundCashflow(pv, Cashflow_Rounding);
if (tgi.Date < fPaymentDate)
{
pv.MultiplyBy(discountRate.Get(tgi.T, tPay));
}
else if (tgi.Date == fPaymentDate)
{
cashResults.Accumulate(fxRate, fPaymentDate, pv);
}
}
else
{
pv.Clear();
}
pvResults.AppendVector(tgi.Date, pv * fxRate.Get(tgi.T));
}
});
// After maturity
pvResults.Complete(timeGrid);
}
