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private forwardingTermStructure ( ) : Handle |
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| Результат | Handle |
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public VanillaSwap value()
{
Date startDate;
if (effectiveDate_ != null)
{
startDate = effectiveDate_;
}
else
{
int fixingDays = iborIndex_.fixingDays();
Date referenceDate = Settings.evaluationDate();
Date spotDate = floatCalendar_.advance(referenceDate, new Period(fixingDays, TimeUnit.Days));
startDate = spotDate + forwardStart_;
}
Date endDate;
if (terminationDate_ != null)
{
endDate = terminationDate_;
}
else
{
endDate = startDate + swapTenor_;
}
Schedule fixedSchedule = new Schedule(startDate, endDate,
fixedTenor_, fixedCalendar_,
fixedConvention_, fixedTerminationDateConvention_,
fixedRule_, fixedEndOfMonth_,
fixedFirstDate_, fixedNextToLastDate_);
Schedule floatSchedule = new Schedule(startDate, endDate,
floatTenor_, floatCalendar_,
floatConvention_, floatTerminationDateConvention_,
floatRule_, floatEndOfMonth_,
floatFirstDate_, floatNextToLastDate_);
double?usedFixedRate = fixedRate_;
if (fixedRate_ == null) // calculate a fair fixed rate if no fixed rate is provided
{
if (iborIndex_.forwardingTermStructure().empty())
{
throw new ArgumentException("no forecasting term structure set to " + iborIndex_.name());
}
VanillaSwap temp = new VanillaSwap(type_, nominal_, fixedSchedule, 0.0, fixedDayCount_,
floatSchedule, iborIndex_, floatSpread_, floatDayCount_);
temp.setPricingEngine(new DiscountingSwapEngine(iborIndex_.forwardingTermStructure()));
usedFixedRate = temp.fairRate();
}
VanillaSwap swap = new VanillaSwap(type_, nominal_, fixedSchedule, usedFixedRate.Value, fixedDayCount_,
floatSchedule, iborIndex_, floatSpread_, floatDayCount_);
swap.setPricingEngine(engine_);
return(swap);
}
public LiborForwardModelProcess(int size, IborIndex index, IDiscretization disc)
: base(disc)
{
size_ = size;
index_ = index;
initialValues_ = new InitializedList <double>(size_);
fixingTimes_ = new InitializedList <double>(size);
fixingDates_ = new InitializedList <Date>(size_);
accrualStartTimes_ = new InitializedList <double>(size);
accrualEndTimes_ = new InitializedList <double>(size);
accrualPeriod_ = new InitializedList <double>(size_);
m1 = new Vector(size_);
m2 = new Vector(size_);
DayCounter dayCounter = index.dayCounter();
IList <CashFlow> flows = cashFlows(1);
if (!(size_ == flows.Count))
{
throw new ArgumentException("wrong number of cashflows");
}
Date settlement = index_.forwardingTermStructure().link.referenceDate();
Date startDate;
IborCoupon iborcoupon = (IborCoupon)flows[0];
startDate = iborcoupon.fixingDate();
for (int i = 0; i < size_; ++i)
{
IborCoupon coupon = (IborCoupon)flows[i];
if (!(coupon.date() == coupon.accrualEndDate()))
{
throw new ArgumentException("irregular coupon types are not suppported");
}
initialValues_[i] = coupon.rate();
accrualPeriod_[i] = coupon.accrualPeriod();
fixingDates_[i] = coupon.fixingDate();
fixingTimes_[i] = dayCounter.yearFraction(startDate, coupon.fixingDate());
accrualStartTimes_[i] = dayCounter.yearFraction(settlement, coupon.accrualStartDate());
accrualEndTimes_[i] = dayCounter.yearFraction(settlement, coupon.accrualEndDate());
}
}
public List <CashFlow> cashFlows(double amount)
{
Date refDate = index_.forwardingTermStructure().link.referenceDate();
Schedule schedule = new Schedule(refDate,
refDate + new Period(index_.tenor().length() * size_,
index_.tenor().units()),
index_.tenor(), index_.fixingCalendar(),
index_.businessDayConvention(),
index_.businessDayConvention(),
DateGeneration.Rule.Forward, false);
IborLeg cashflows = (IborLeg) new IborLeg(schedule, index_)
.withFixingDays(index_.fixingDays())
.withPaymentDayCounter(index_.dayCounter())
.withNotionals(amount)
.withPaymentAdjustment(index_.businessDayConvention());
return(cashflows.value());
}
public RangeAccrualFloatersCoupon(Date paymentDate,
double nominal,
IborIndex index,
Date startDate,
Date endDate,
int fixingDays,
DayCounter dayCounter,
double gearing,
double spread,
Date refPeriodStart,
Date refPeriodEnd,
Schedule observationsSchedule,
double lowerTrigger,
double upperTrigger)
: base(paymentDate, nominal, startDate, endDate, fixingDays, index, gearing, spread, refPeriodStart, refPeriodEnd,
dayCounter)
{
observationsSchedule_ = observationsSchedule;
lowerTrigger_ = lowerTrigger;
upperTrigger_ = upperTrigger;
Utils.QL_REQUIRE(lowerTrigger_ < upperTrigger, () => "lowerTrigger_>=upperTrigger");
Utils.QL_REQUIRE(observationsSchedule_.startDate() == startDate, () => "incompatible start date");
Utils.QL_REQUIRE(observationsSchedule_.endDate() == endDate, () => "incompatible end date");
observationDates_ = new List <Date>(observationsSchedule_.dates());
observationDates_.RemoveAt(observationDates_.Count - 1); //remove end date
observationDates_.RemoveAt(0); //remove start date
observationsNo_ = observationDates_.Count;
Handle <YieldTermStructure> rateCurve = index.forwardingTermStructure();
Date referenceDate = rateCurve.link.referenceDate();
startTime_ = dayCounter.yearFraction(referenceDate, startDate);
endTime_ = dayCounter.yearFraction(referenceDate, endDate);
observationTimes_ = new List <double>();
for (int i = 0; i < observationsNo_; i++)
{
observationTimes_.Add(dayCounter.yearFraction(referenceDate, observationDates_[i]));
}
}
public LiborForwardModelProcess(int size, IborIndex index, IDiscretization disc)
: base(disc)
{
size_ = size;
index_ = index;
initialValues_ = new InitializedList<double>(size_);
fixingTimes_ = new InitializedList<double>(size);
fixingDates_ = new InitializedList<Date>(size_);
accrualStartTimes_ = new InitializedList<double>(size);
accrualEndTimes_ = new InitializedList<double>(size);
accrualPeriod_ = new InitializedList<double>(size_);
m1 = new Vector(size_);
m2 = new Vector(size_);
DayCounter dayCounter = index.dayCounter();
IList<CashFlow> flows = cashFlows(1);
if(!(size_ == flows.Count))
throw new ArgumentException( "wrong number of cashflows");
Date settlement = index_.forwardingTermStructure().link.referenceDate();
Date startDate;
IborCoupon iborcoupon = (IborCoupon)flows[0];
startDate = iborcoupon.fixingDate();
for (int i = 0; i < size_; ++i)
{
IborCoupon coupon = (IborCoupon)flows[i];
if(!(coupon.date() == coupon.accrualEndDate()))
throw new ArgumentException("irregular coupon types are not suppported");
initialValues_[i]=coupon.rate();
accrualPeriod_[i]=coupon.accrualPeriod();
fixingDates_[i]=coupon.fixingDate();
fixingTimes_[i]=dayCounter.yearFraction(startDate, coupon.fixingDate());
accrualStartTimes_[i]=dayCounter.yearFraction(settlement, coupon.accrualStartDate());
accrualEndTimes_[i]=dayCounter.yearFraction(settlement, coupon.accrualEndDate());
}
}
public override void initialize(FloatingRateCoupon coupon)
{
coupon_ = coupon as RangeAccrualFloatersCoupon;
Utils.QL_REQUIRE(coupon_ != null, () => "range-accrual coupon required");
gearing_ = coupon_.gearing();
spread_ = coupon_.spread();
Date paymentDate = coupon_.date();
IborIndex index = coupon_.index() as IborIndex;
Utils.QL_REQUIRE(index != null, () => "invalid index");
Handle <YieldTermStructure> rateCurve = index.forwardingTermStructure();
discount_ = rateCurve.link.discount(paymentDate);
accrualFactor_ = coupon_.accrualPeriod();
spreadLegValue_ = spread_ * accrualFactor_ * discount_;
startTime_ = coupon_.startTime();
endTime_ = coupon_.endTime();
observationTimes_ = coupon_.observationTimes();
lowerTrigger_ = coupon_.lowerTrigger();
upperTrigger_ = coupon_.upperTrigger();
observationsNo_ = coupon_.observationsNo();
List <Date> observationDates = coupon_.observationsSchedule().dates();
Utils.QL_REQUIRE(observationDates.Count == observationsNo_ + 2, () => "incompatible size of initialValues vector");
initialValues_ = new InitializedList <double>(observationDates.Count, 0.0);
Calendar calendar = index.fixingCalendar();
for (int i = 0; i < observationDates.Count; i++)
{
initialValues_[i] = index.fixing(
calendar.advance(observationDates[i], -coupon_.fixingDays, TimeUnit.Days));
}
}
public MakeVanillaSwap(Period swapTenor, IborIndex index, double? fixedRate, Period forwardStart) {
swapTenor_ = swapTenor;
iborIndex_ = index;
fixedRate_ = fixedRate;
forwardStart_ = forwardStart;
effectiveDate_ = null;
fixedCalendar_ = floatCalendar_ = index.fixingCalendar();
type_ = VanillaSwap.Type.Payer;
nominal_ = 1.0;
fixedTenor_ = new Period(1, TimeUnit.Years);
floatTenor_ = index.tenor();
fixedConvention_ = fixedTerminationDateConvention_ = BusinessDayConvention.ModifiedFollowing;
floatConvention_ = floatTerminationDateConvention_ = index.businessDayConvention();
fixedRule_ = floatRule_ = DateGeneration.Rule.Backward;
fixedEndOfMonth_ = floatEndOfMonth_ = false;
fixedFirstDate_ = fixedNextToLastDate_ = floatFirstDate_ = floatNextToLastDate_ = null;
floatSpread_ = 0.0;
fixedDayCount_ = new Thirty360(Thirty360.Thirty360Convention.BondBasis);
floatDayCount_ = index.dayCounter();
engine_ = new DiscountingSwapEngine(index.forwardingTermStructure());
}
public MakeVanillaSwap(Period swapTenor, IborIndex index, double?fixedRate, Period forwardStart)
{
swapTenor_ = swapTenor;
iborIndex_ = index;
fixedRate_ = fixedRate;
forwardStart_ = forwardStart;
effectiveDate_ = null;
fixedCalendar_ = floatCalendar_ = index.fixingCalendar();
type_ = VanillaSwap.Type.Payer;
nominal_ = 1.0;
fixedTenor_ = new Period(1, TimeUnit.Years);
floatTenor_ = index.tenor();
fixedConvention_ = fixedTerminationDateConvention_ = BusinessDayConvention.ModifiedFollowing;
floatConvention_ = floatTerminationDateConvention_ = index.businessDayConvention();
fixedRule_ = floatRule_ = DateGeneration.Rule.Backward;
fixedEndOfMonth_ = floatEndOfMonth_ = false;
fixedFirstDate_ = fixedNextToLastDate_ = floatFirstDate_ = floatNextToLastDate_ = null;
floatSpread_ = 0.0;
fixedDayCount_ = new Thirty360(Thirty360.Thirty360Convention.BondBasis);
floatDayCount_ = index.dayCounter();
engine_ = new DiscountingSwapEngine(index.forwardingTermStructure());
}
//===========================================================================//
// BlackIborCouponPricer //
//===========================================================================//
public override void initialize(FloatingRateCoupon coupon)
{
coupon_ = coupon as IborCoupon;
if (coupon_ == null)
{
throw new ApplicationException("Libor coupon required");
}
gearing_ = coupon_.gearing();
spread_ = coupon_.spread();
Date paymentDate = coupon_.date();
IborIndex index = coupon_.index() as IborIndex;
Handle <YieldTermStructure> rateCurve = index.forwardingTermStructure();
if (paymentDate > rateCurve.link.referenceDate())
{
discount_ = rateCurve.link.discount(paymentDate);
}
else
{
discount_ = 1.0;
}
spreadLegValue_ = spread_ * coupon_.accrualPeriod() * discount_;
}
protected override void initializeDates()
{
earliestDate_ = calendar_.advance(evaluationDate_, new Period(settlementDays_, TimeUnit.Days),
BusinessDayConvention.Following);
Date maturity = earliestDate_ + tenor_;
// dummy BMA index with curve/swap arguments
BMAIndex clonedIndex = new BMAIndex(termStructureHandle_);
Schedule bmaSchedule = new MakeSchedule().from(earliestDate_).to(maturity)
.withTenor(bmaPeriod_)
.withCalendar(bmaIndex_.fixingCalendar())
.withConvention(bmaConvention_)
.backwards()
.value();
Schedule liborSchedule = new MakeSchedule().from(earliestDate_).to(maturity)
.withTenor(iborIndex_.tenor())
.withCalendar(iborIndex_.fixingCalendar())
.withConvention(iborIndex_.businessDayConvention())
.endOfMonth(iborIndex_.endOfMonth())
.backwards()
.value();
swap_ = new BMASwap(BMASwap.Type.Payer, 100.0, liborSchedule, 0.75, // arbitrary
0.0, iborIndex_, iborIndex_.dayCounter(), bmaSchedule, clonedIndex, bmaDayCount_);
swap_.setPricingEngine(new DiscountingSwapEngine(iborIndex_.forwardingTermStructure()));
Date d = calendar_.adjust(swap_.maturityDate(), BusinessDayConvention.Following);
int w = d.weekday();
Date nextWednesday = (w >= 4) ? d + new Period((11 - w), TimeUnit.Days) :
d + new Period((4 - w), TimeUnit.Days);
latestDate_ = clonedIndex.valueDate(clonedIndex.fixingCalendar().adjust(nextWednesday));
}
public MakeBasisSwap(Period swapTenor, IborIndex index1, IborIndex index2, Period forwardStart)
{
swapTenor_ = swapTenor;
iborIndex1_ = index1;
iborIndex2_ = index2;
forwardStart_ = forwardStart;
effectiveDate_ = null;
float1Calendar_ = float2Calendar_ = index1.fixingCalendar();
type_ = BasisSwap.Type.Payer;
nominal_ = 1.0;
float1Tenor_ = index1.tenor();
float2Tenor_ = index2.tenor();
float1Convention_ = float1TerminationDateConvention_ = index1.businessDayConvention();
float2Convention_ = float2TerminationDateConvention_ = index2.businessDayConvention();
float1Rule_ = float2Rule_ = DateGeneration.Rule.Backward;
float1EndOfMonth_ = float2EndOfMonth_ = false;
float1FirstDate_ = float1NextToLastDate_ = float2FirstDate_ = float2NextToLastDate_ = null;
float1Spread_ = float2Spread_ = 0.0;
float1DayCount_ = index1.dayCounter();
float2DayCount_ = index2.dayCounter();
engine_ = new DiscountingBasisSwapEngine(index1.forwardingTermStructure(), index2.forwardingTermStructure());
}
public MakeBasisSwap(Period swapTenor, IborIndex index1, IborIndex index2, Period forwardStart)
{
swapTenor_ = swapTenor;
iborIndex1_ = index1;
iborIndex2_ = index2;
forwardStart_ = forwardStart;
effectiveDate_ = null;
float1Calendar_ = float2Calendar_ = index1.fixingCalendar();
type_ = BasisSwap.Type.Payer;
nominal_ = 1.0;
float1Tenor_ = index1.tenor();
float2Tenor_ = index2.tenor();
float1Convention_ = float1TerminationDateConvention_ = index1.businessDayConvention();
float2Convention_ = float2TerminationDateConvention_ = index2.businessDayConvention();
float1Rule_ = float2Rule_ = DateGeneration.Rule.Backward;
float1EndOfMonth_ = float2EndOfMonth_ = false;
float1FirstDate_ = float1NextToLastDate_ = float2FirstDate_ = float2NextToLastDate_ = null;
float1Spread_ = float2Spread_ = 0.0;
float1DayCount_ = index1.dayCounter();
float2DayCount_ = index2.dayCounter();
engine_ = new DiscountingBasisSwapEngine(index1.forwardingTermStructure(), index2.forwardingTermStructure());
}
public Handle <YieldTermStructure> forwardingTermStructure()
{
return(iborIndex_.forwardingTermStructure());
}
public VanillaSwap value()
{
Date startDate;
if (effectiveDate_ != null)
{
startDate = effectiveDate_;
}
else
{
//int fixingDays = iborIndex_.fixingDays();
Date refDate = Settings.evaluationDate();
// if the evaluation date is not a business day
// then move to the next business day
refDate = floatCalendar_.adjust(refDate);
Date spotDate = floatCalendar_.advance(refDate, new Period(settlementDays_, TimeUnit.Days));
startDate = spotDate + forwardStart_;
if (forwardStart_.length() < 0)
{
startDate = floatCalendar_.adjust(startDate, BusinessDayConvention.Preceding);
}
else
{
startDate = floatCalendar_.adjust(startDate, BusinessDayConvention.Following);
}
}
Date endDate = terminationDate_;
if (endDate == null)
{
if (floatEndOfMonth_)
{
endDate = floatCalendar_.advance(startDate,
swapTenor_,
BusinessDayConvention.ModifiedFollowing,
floatEndOfMonth_);
}
else
{
endDate = startDate + swapTenor_;
}
}
Currency curr = iborIndex_.currency();
Period fixedTenor = null;
if (fixedTenor_ != null)
{
fixedTenor = fixedTenor_;
}
else
{
if ((curr == new EURCurrency()) ||
(curr == new USDCurrency()) ||
(curr == new CHFCurrency()) ||
(curr == new SEKCurrency()) ||
(curr == new GBPCurrency() && swapTenor_ <= new Period(1, TimeUnit.Years)))
{
fixedTenor = new Period(1, TimeUnit.Years);
}
else if ((curr == new GBPCurrency() && swapTenor_ > new Period(1, TimeUnit.Years) ||
(curr == new JPYCurrency()) ||
(curr == new AUDCurrency() && swapTenor_ >= new Period(4, TimeUnit.Years))))
{
fixedTenor = new Period(6, TimeUnit.Months);
}
else if ((curr == new HKDCurrency() ||
(curr == new AUDCurrency() && swapTenor_ < new Period(4, TimeUnit.Years))))
{
fixedTenor = new Period(3, TimeUnit.Months);
}
else
{
Utils.QL_FAIL("unknown fixed leg default tenor for " + curr);
}
}
Schedule fixedSchedule = new Schedule(startDate, endDate,
fixedTenor, fixedCalendar_,
fixedConvention_, fixedTerminationDateConvention_,
fixedRule_, fixedEndOfMonth_,
fixedFirstDate_, fixedNextToLastDate_);
Schedule floatSchedule = new Schedule(startDate, endDate,
floatTenor_, floatCalendar_,
floatConvention_, floatTerminationDateConvention_,
floatRule_, floatEndOfMonth_,
floatFirstDate_, floatNextToLastDate_);
DayCounter fixedDayCount = null;
if (fixedDayCount_ != null)
{
fixedDayCount = fixedDayCount_;
}
else
{
if (curr == new USDCurrency())
{
fixedDayCount = new Actual360();
}
else if (curr == new EURCurrency() || curr == new CHFCurrency() || curr == new SEKCurrency())
{
fixedDayCount = new Thirty360(Thirty360.Thirty360Convention.BondBasis);
}
else if (curr == new GBPCurrency() || curr == new JPYCurrency() || curr == new AUDCurrency() ||
curr == new HKDCurrency())
{
fixedDayCount = new Actual365Fixed();
}
else
{
Utils.QL_FAIL("unknown fixed leg day counter for " + curr);
}
}
double?usedFixedRate = fixedRate_;
if (fixedRate_ == null)
{
VanillaSwap temp = new VanillaSwap(type_, nominal_, fixedSchedule, 0.0, fixedDayCount,
floatSchedule, iborIndex_, floatSpread_, floatDayCount_);
if (engine_ == null)
{
Handle <YieldTermStructure> disc = iborIndex_.forwardingTermStructure();
Utils.QL_REQUIRE(!disc.empty(), () =>
"null term structure set to this instance of " + iborIndex_.name());
bool includeSettlementDateFlows = false;
IPricingEngine engine = new DiscountingSwapEngine(disc, includeSettlementDateFlows);
temp.setPricingEngine(engine);
}
else
{
temp.setPricingEngine(engine_);
}
usedFixedRate = temp.fairRate();
}
VanillaSwap swap = new VanillaSwap(type_, nominal_, fixedSchedule, usedFixedRate.Value, fixedDayCount,
floatSchedule, iborIndex_, floatSpread_, floatDayCount_);
if (engine_ == null)
{
Handle <YieldTermStructure> disc = iborIndex_.forwardingTermStructure();
bool includeSettlementDateFlows = false;
IPricingEngine engine = new DiscountingSwapEngine(disc, includeSettlementDateFlows);
swap.setPricingEngine(engine);
}
else
{
swap.setPricingEngine(engine_);
}
return(swap);
}
//! Implemented in order to manage the case of par coupon
public override double indexFixing()
{
#if QL_USE_INDEXED_COUPON
return(index_.fixing(fixingDate()));
#else
if (isInArrears())
{
return(index_.fixing(fixingDate()));
}
else
{
Date today = Settings.evaluationDate();
Date fixingDate = this.fixingDate();
TimeSeries <double> fixings = IndexManager.instance().getHistory(index_.name()).value();
if (fixings.ContainsKey(fixingDate))
{
return(fixings[fixingDate]);
}
else
{
if (fixingDate < today)
{
// must have been fixed
if (IndexManager.MissingPastFixingCallBack == null)
{
throw new ArgumentException("Missing " + index_.name() + " fixing for " + fixingDate);
}
else
{
// try to load missing fixing from external source
double fixing = IndexManager.MissingPastFixingCallBack(index_, fixingDate);
// add to history
index_.addFixing(fixingDate, fixing);
return(fixing);
}
}
if (fixingDate == today)
{
// might have been fixed
// fall through and forecast
}
}
// forecast: 0) forecasting curve
Handle <YieldTermStructure> termStructure = iborIndex_.forwardingTermStructure();
if (termStructure.empty())
{
throw new ApplicationException("null term structure set to this instance of " +
index_.name());
}
// forecast: 1) startDiscount
Date fixingValueDate = index_.fixingCalendar().advance(fixingDate, index_.fixingDays(), TimeUnit.Days);
double startDiscount = termStructure.link.discount(fixingValueDate);
// forecast: 2) endDiscount
Date nextFixingDate = index_.fixingCalendar().advance(accrualEndDate_, -fixingDays, TimeUnit.Days);
Date nextFixingValueDate = index_.fixingCalendar().advance(nextFixingDate, index_.fixingDays(), TimeUnit.Days);
double endDiscount = termStructure.link.discount(nextFixingValueDate);
// forecast: 3) spanningTime
double spanningTime = index_.dayCounter().yearFraction(fixingValueDate, nextFixingValueDate);
if (!(spanningTime > 0.0))
{
throw new ApplicationException("cannot calculate forward rate between " +
fixingValueDate + " and " + nextFixingValueDate +
": non positive time using " + index_.dayCounter().name());
}
// forecast: 4) implied fixing
return((startDiscount / endDiscount - 1.0) / spanningTime);
}
#endif
}