/// <summary>
/// Returns true if the cashflow list consists of vanilla swaplets, caplets and floorlets.
/// </summary>
private bool IsValidCashflowList(PriceFactorList factors, CFFloatingInterestListDeal deal)
{
// Get characteristics using cashflow list from the original deal.
CashflowListCharacteristics characteristics = deal.Cashflows.Analyze(factors.BaseDate);
bool isCompounding = deal.Cashflows.Compounding_Method != CompoundingMethod.None;
return(!fForecastIsForeign &&
characteristics.IsStandardPayoff &&
characteristics.IsStandardLibor &&
!isCompounding);
}
/// <summary>
/// Warn of unnecessary volatility surface definitions.
/// </summary>
/// <remarks>
/// Test differently if the cap and swaption volatility definitions are the same or
/// distinct because they may have been set by a single property or two distinct ones.
/// </remarks>
private static void ValidateUnnecessaryVolatilities(CFFloatingInterestListDeal deal, VolatilityRequirements requirements, ErrorList errors)
{
if (deal.Discount_Rate_Cap_Volatility == deal.Discount_Rate_Swaption_Volatility)
{
if (!requirements.NeedDiscountRateVol && !requirements.NeedDiscountYieldVol && !string.IsNullOrEmpty(deal.Discount_Rate_Cap_Volatility))
{
deal.AddToErrors(errors, ErrorLevel.Info, $"Unnecessary {nameof(deal.Discount_Rate_Cap_Volatility)} and {nameof(deal.Discount_Rate_Swaption_Volatility)} {deal.Discount_Rate_Cap_Volatility}.");
}
}
else
{
if (!requirements.NeedDiscountRateVol && !string.IsNullOrEmpty(deal.Discount_Rate_Cap_Volatility))
{
deal.AddToErrors(errors, ErrorLevel.Info, $"Unnecessary {nameof(deal.Discount_Rate_Cap_Volatility)} {deal.Discount_Rate_Cap_Volatility}.");
}
if (!requirements.NeedDiscountYieldVol && !string.IsNullOrEmpty(deal.Discount_Rate_Swaption_Volatility))
{
deal.AddToErrors(errors, ErrorLevel.Info, $"Unnecessary {nameof(deal.Discount_Rate_Swaption_Volatility)} {deal.Discount_Rate_Swaption_Volatility}.");
}
}
if (deal.Forecast_Rate_Cap_Volatility == deal.Forecast_Rate_Swaption_Volatility)
{
if (!requirements.NeedForecastRateVol && !requirements.NeedForecastYieldVol && !string.IsNullOrEmpty(deal.Forecast_Rate_Cap_Volatility))
{
deal.AddToErrors(errors, ErrorLevel.Info, $"Unnecessary {nameof(deal.Forecast_Rate_Cap_Volatility)} and {nameof(deal.Forecast_Rate_Swaption_Volatility)} {deal.Forecast_Rate_Cap_Volatility}.");
}
}
else
{
if (!requirements.NeedForecastRateVol && !string.IsNullOrEmpty(deal.Forecast_Rate_Cap_Volatility))
{
deal.AddToErrors(errors, ErrorLevel.Info, $"Unnecessary {nameof(deal.Forecast_Rate_Cap_Volatility)} {deal.Forecast_Rate_Cap_Volatility}.");
}
if (!requirements.NeedForecastYieldVol && !string.IsNullOrEmpty(deal.Forecast_Rate_Swaption_Volatility))
{
deal.AddToErrors(errors, ErrorLevel.Info, $"Unnecessary {nameof(deal.Forecast_Rate_Swaption_Volatility)} {deal.Forecast_Rate_Swaption_Volatility}.");
}
}
}
/// <summary>
/// Register price factors used in valuation.
/// </summary>
public override void RegisterFactors(PriceFactorList factors, ErrorList errors)
{
base.RegisterFactors(factors, errors);
CFFloatingInterestListDeal deal = (CFFloatingInterestListDeal)Deal;
// Deal validation specific to CFFloatingInterestListValuation
foreach (var cashflow in deal.Cashflows)
{
if (!cashflow.Resets.Any())
{
continue;
}
var lastResetDate = cashflow.Resets.Last().Reset_Date;
if (cashflow.FX_Reset_Date > 0.0 && cashflow.FX_Reset_Date < lastResetDate)
{
errors.Add(ErrorLevel.Warning, string.Format("Quanto adjustments for cashflow paying on {0} are not supported when the FX reset date {1} is before interest rate reset date {2}", cashflow.Payment_Date, cashflow.FX_Reset_Date, lastResetDate));
}
}
// Get characteristics
CashflowListCharacteristics characteristics = deal.Cashflows.Analyze(factors.BaseDate);
bool quanto = fForecastIsForeign && characteristics.HasQuanto && Quanto_Correction == YesNo.Yes;
bool convexity = !characteristics.IsStandardLibor && Convexity_Correction == YesNo.Yes;
var requirements = new VolatilityRequirements(
characteristics.HasCms,
characteristics.HasLibor && (characteristics.HasOptionlet || convexity || quanto),
characteristics.HasCms && convexity,
characteristics.HasLibor && convexity);
// Collect registered volatility price factors to check they have the same distribution type
var volPriceFactors = new List <IInterestVol>();
// register forecast rate volatility surfaces
if (requirements.NeedForecastYieldVol)
{
volPriceFactors.Add(InterestVolBase.RegisterInterestYieldVol(factors, deal.Forecast_Rate_Swaption_Volatility, fForecastCurrency));
}
if (requirements.NeedForecastRateVol)
{
volPriceFactors.Add(InterestVolBase.RegisterInterestRateVol(factors, deal.Forecast_Rate_Cap_Volatility, fForecastCurrency));
}
if (requirements.NeedDiscountYieldVol)
{
volPriceFactors.Add(InterestVolBase.RegisterInterestYieldVol(factors, deal.Discount_Rate_Swaption_Volatility, fCurrency));
}
if (requirements.NeedDiscountRateVol)
{
volPriceFactors.Add(InterestVolBase.RegisterInterestRateVol(factors, deal.Discount_Rate_Cap_Volatility, fCurrency));
}
if (fForecastIsForeign)
{
// Register factor for translation from forecast rate currency to settlement currency for cashflows with FX reset date
if (characteristics.HasFXReset)
{
factors.RegisterInterface <IFxRate>(fForecastCurrency);
}
if (quanto)
{
FXVolHelper.Register(factors, fForecastCurrency, fCurrency);
CorrelationHelper.Register(factors, typeof(IInterestRate), fForecastCurrency, null, typeof(IFxRate), fForecastCurrency, fCurrency);
CorrelationHelper.Register(factors, typeof(IInterestRate), fForecastCurrency, null, typeof(IInterestRate), fCurrency, null);
}
}
if (volPriceFactors.Select(pf => pf.GetDistributionType()).Distinct().Count() > 1)
{
deal.AddToErrors(errors, "Volatility price factors must have the same distribution type.");
}
ValidateUnnecessaryVolatilities(deal, requirements, errors);
}
/// <summary>
/// Calculate valuation metrics requested by the Base Valuation calculation.
/// </summary>
private void CalculateMetrics(ValuationResults valuationResults, PriceFactorList factors, CFFloatingInterestListDeal deal)
{
var results = valuationResults.Results <ValuationMetrics>();
if (results == null)
{
return;
}
if (results.IsMetricRequested(ValuationMetricConstants.AccruedInterest))
{
using (var cache = Vector.Cache(factors.NumScenarios))
{
double?parameter = results.GetMetricParameter(ValuationMetricParameterConstants.AccrueFromToday);
bool accrueFromToday = parameter.HasValue && parameter.Value == 1.0;
Vector accruedInterest = cache.GetClear();
fCashflows.CalculateAccrual(accruedInterest, factors.BaseDate, factors.BaseDate, accrueFromToday, deal.AccrualHolidayCalendar(), fForecastRate);
double buySellSign = deal.Buy_Sell == BuySell.Buy ? 1.0 : -1.0;
results.SetMetricValue(ValuationMetricConstants.AccruedInterest, new ValuationId(this), buySellSign * accruedInterest[0]);
}
}
}
