/// <summary>
///
/// </summary>
/// <param name="notionalStepSchedule"></param>
/// <param name="dates"></param>
/// <returns></returns>
protected static decimal[] CreateWeightingsFromNonNegativeNotionalSchedule(NonNegativeAmountSchedule notionalStepSchedule, IList <DateTime> dates)
{
var result = new List <Decimal>();
var initalNotional = notionalStepSchedule.initialValue;
if (null != notionalStepSchedule.step)//there should be steps - otherwise NO interm. exchanges.
{
result.AddRange(dates.Select(date => ScheduleHelper.GetValue(notionalStepSchedule, date)).Select(stepAmount => stepAmount / initalNotional));
}
return(result.ToArray());
}
private static void UpdateCalculationPeriodData(Calculation calculation, CalculationPeriod calculationPeriod, Notional notinalSchedule)
{
bool hasFloatingRateCalculation = XsdClassesFieldResolver.CalculationHasFloatingRateCalculation(calculation);
bool hasFixedRate = XsdClassesFieldResolver.CalculationHasFixedRateSchedule(calculation);
if (!(hasFloatingRateCalculation ^ hasFixedRate))
{
throw new System.Exception("at least one type of rate (floating or fixed) must be specified.");
}
decimal notional = NotionalHelper.GetNotionalValue(notinalSchedule, calculationPeriod.adjustedStartDate);
// Notional amount
//
XsdClassesFieldResolver.CalculationPeriodSetNotionalAmount(calculationPeriod, notional);
// Fixed rate
//
if (hasFixedRate)
{
Schedule fixedRateSchedule = XsdClassesFieldResolver.CalculationGetFixedRateSchedule(calculation);
decimal fixedRate = ScheduleHelper.GetValue(fixedRateSchedule, calculationPeriod.adjustedStartDate);
XsdClassesFieldResolver.SetCalculationPeriodFixedRate(calculationPeriod, fixedRate);
}
// Floating rate
//
else// if (hasFloatingRateCalculation)
{
// no observed, no calculated rate, spread == 0.0
//
var floatingRateDefinition = (FloatingRateDefinition)calculationPeriod.Item1 ?? new FloatingRateDefinition();
// check if stream has spreadSchedule
//
if (XsdClassesFieldResolver.CalculationHasSpreadSchedule(calculation))
{
Schedule spreadSchedule = XsdClassesFieldResolver.GetCalculationSpreadSchedule(calculation);
decimal spread = ScheduleHelper.GetValue(spreadSchedule, calculationPeriod.adjustedStartDate);
floatingRateDefinition.spread = spread;
floatingRateDefinition.spreadSpecified = true;
}
FloatingRateCalculation floatingRateCalculation = XsdClassesFieldResolver.CalculationGetFloatingRateCalculation(calculation);
// Check if there's a capRateSchedule
//
if (null != floatingRateCalculation.capRateSchedule)
{
StrikeSchedule capRateSchedule = floatingRateCalculation.capRateSchedule[0];
var capStrike = new Strike();
var capRate = ScheduleHelper.GetValue(capRateSchedule, calculationPeriod.adjustedStartDate);
capStrike.strikeRate = capRate;
floatingRateDefinition.capRate = new[] { capStrike };
}
// Check if there's a capRateSchedule
//
if (null != floatingRateCalculation.floorRateSchedule)
{
StrikeSchedule floorRateSchedule = floatingRateCalculation.floorRateSchedule[0];
var floorStrike = new Strike();
decimal floorRate = ScheduleHelper.GetValue(floorRateSchedule, calculationPeriod.adjustedStartDate);
floorStrike.strikeRate = floorRate;
floatingRateDefinition.floorRate = new[] { floorStrike };
}
calculationPeriod.Item1 = floatingRateDefinition;
}
}
/// <summary>
/// Update calculation periods with rates/notional.
/// </summary>
/// <param name="interestRateStream"></param>
/// <param name="calculationPeriodsPrincipalExchangesAndStubs"></param>
public static void UpdateCalculationPeriodsData(InterestRateStream interestRateStream, CalculationPeriodsPrincipalExchangesAndStubs calculationPeriodsPrincipalExchangesAndStubs)
{
Calculation calculation = XsdClassesFieldResolver.CalculationPeriodAmountGetCalculation(interestRateStream.calculationPeriodAmount);
Notional notionalSchedule = XsdClassesFieldResolver.CalculationGetNotionalSchedule(calculation);
#region Generate FUTURE amounts for principle exchanges
// Initial PE
//
if (null != calculationPeriodsPrincipalExchangesAndStubs.InitialPrincipalExchange)
{
// initial OUTflow
//
decimal initialNotionalValue = ScheduleHelper.GetValue(notionalSchedule.notionalStepSchedule, calculationPeriodsPrincipalExchangesAndStubs.InitialPrincipalExchange.adjustedPrincipalExchangeDate);
calculationPeriodsPrincipalExchangesAndStubs.InitialPrincipalExchange.principalExchangeAmount = -initialNotionalValue;
calculationPeriodsPrincipalExchangesAndStubs.InitialPrincipalExchange.principalExchangeAmountSpecified = true;
}
// intermediatory PE
//
foreach (PrincipalExchange intermediatoryExchange in calculationPeriodsPrincipalExchangesAndStubs.IntermediatePrincipalExchanges)
{
DateTime principleExchangeDate = intermediatoryExchange.adjustedPrincipalExchangeDate;
//value at the day before principle exchange day
//
decimal prevNotionalValue = ScheduleHelper.GetValue(notionalSchedule.notionalStepSchedule, principleExchangeDate.AddDays(-1));
//value at principle exchange day ..
//
decimal newNotionalValue = ScheduleHelper.GetValue(notionalSchedule.notionalStepSchedule, principleExchangeDate);
decimal principalExchangeAmount = prevNotionalValue - newNotionalValue;
intermediatoryExchange.principalExchangeAmount = principalExchangeAmount;
intermediatoryExchange.principalExchangeAmountSpecified = true;
}
// Final PE
//
if (null != calculationPeriodsPrincipalExchangesAndStubs.FinalPrincipalExchange)
{
// pay the rest ot the notional back
//
decimal newNotionalValue = ScheduleHelper.GetValue(notionalSchedule.notionalStepSchedule,
calculationPeriodsPrincipalExchangesAndStubs.FinalPrincipalExchange.adjustedPrincipalExchangeDate);
calculationPeriodsPrincipalExchangesAndStubs.FinalPrincipalExchange.principalExchangeAmount = newNotionalValue;
calculationPeriodsPrincipalExchangesAndStubs.FinalPrincipalExchange.principalExchangeAmountSpecified = true;
}
#endregion
// Process standard calculation periods
//
foreach (CalculationPeriod calculationPeriod in calculationPeriodsPrincipalExchangesAndStubs.CalculationPeriods)
{
UpdateCalculationPeriodData(calculation, calculationPeriod, notionalSchedule);
}
// Process stub calculation periods
//
if (null != interestRateStream.stubCalculationPeriodAmount)
{
if ((null == interestRateStream.stubCalculationPeriodAmount.initialStub) &&
(null == interestRateStream.stubCalculationPeriodAmount.finalStub))
{
throw new System.Exception(
"interestRateStream.stubCalculationPeriodAmount.initialStub && interestRateStream.stubCalculationPeriodAmount.finalStub are null");
}
StubValue initialStub = interestRateStream.stubCalculationPeriodAmount.initialStub;
StubValue finalStub = interestRateStream.stubCalculationPeriodAmount.finalStub;
if (null != calculationPeriodsPrincipalExchangesAndStubs.InitialStubCalculationPeriod && null != initialStub)
{
UpdateStubCalculationPeriodData(interestRateStream, calculationPeriodsPrincipalExchangesAndStubs.InitialStubCalculationPeriod, initialStub, notionalSchedule);
}
if (null != calculationPeriodsPrincipalExchangesAndStubs.FinalStubCalculationPeriod && null != finalStub)
{
UpdateStubCalculationPeriodData(interestRateStream, calculationPeriodsPrincipalExchangesAndStubs.FinalStubCalculationPeriod, finalStub, notionalSchedule);
}
}
else
{
foreach (CalculationPeriod calculationPeriod in new[] { calculationPeriodsPrincipalExchangesAndStubs.InitialStubCalculationPeriod, calculationPeriodsPrincipalExchangesAndStubs.FinalStubCalculationPeriod })
{
if (null != calculationPeriod)
{
UpdateCalculationPeriodData(calculation, calculationPeriod, notionalSchedule);
}
}
}
}