BermudanSwaption.cpp

This example prices a few bermudan swaptions using different short-rate models calibrated to market swaptions.

/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
#include <ql/quantlib.hpp>
#ifdef BOOST_MSVC
/* Uncomment the following lines to unmask floating-point
exceptions. Warning: unpredictable results can arise...
See http://www.wilmott.com/messageview.cfm?catid=10&threadid=9481
Is there anyone with a definitive word about this?
*/
// #include <float.h>
// namespace { unsigned int u = _controlfp(_EM_INEXACT, _MCW_EM); }
#endif
#include <boost/timer.hpp>
#include <iostream>
#include <iomanip>
using namespace QuantLib;
#if defined(QL_ENABLE_SESSIONS)
namespace QuantLib {
Integer sessionId() { return 0; }
}
#endif
//Number of swaptions to be calibrated to...
Size numRows = 5;
Size numCols = 5;
Integer swapLenghts[] = {
1, 2, 3, 4, 5};
Volatility swaptionVols[] = {
0.1490, 0.1340, 0.1228, 0.1189, 0.1148,
0.1290, 0.1201, 0.1146, 0.1108, 0.1040,
0.1149, 0.1112, 0.1070, 0.1010, 0.0957,
0.1047, 0.1021, 0.0980, 0.0951, 0.1270,
0.1000, 0.0950, 0.0900, 0.1230, 0.1160};
void calibrateModel(
const boost::shared_ptr<ShortRateModel>& model,
const std::vector<boost::shared_ptr<CalibrationHelper> >& helpers) {
LevenbergMarquardt om;
model->calibrate(helpers, om,
EndCriteria(400, 100, 1.0e-8, 1.0e-8, 1.0e-8));
// Output the implied Black volatilities
for (Size i=0; i<numRows; i++) {
Size j = numCols - i -1; // 1x5, 2x4, 3x3, 4x2, 5x1
Size k = i*numCols + j;
Real npv = helpers[i]->modelValue();
Volatility implied = helpers[i]->impliedVolatility(npv, 1e-4,
1000, 0.05, 0.50);
Volatility diff = implied - swaptionVols[k];
std::cout << i+1 << "x" << swapLenghts[j]
<< std::setprecision(5) << std::noshowpos
<< ": model " << std::setw(7) << io::volatility(implied)
<< ", market " << std::setw(7)
<< io::volatility(swaptionVols[k])
<< " (" << std::setw(7) << std::showpos
<< io::volatility(diff) << std::noshowpos << ")\n";
}
}
int main(int, char* []) {
try {
boost::timer timer;
std::cout << std::endl;
Date todaysDate(15, February, 2002);
Calendar calendar = TARGET();
Date settlementDate(19, February, 2002);
Settings::instance().evaluationDate() = todaysDate;
// flat yield term structure impling 1x5 swap at 5%
boost::shared_ptr<Quote> flatRate(new SimpleQuote(0.04875825));
Handle<YieldTermStructure> rhTermStructure(
boost::shared_ptr<FlatForward>(
new FlatForward(settlementDate, Handle<Quote>(flatRate),
Actual365Fixed())));
// Define the ATM/OTM/ITM swaps
Frequency fixedLegFrequency = Annual;
BusinessDayConvention fixedLegConvention = Unadjusted;
BusinessDayConvention floatingLegConvention = ModifiedFollowing;
DayCounter fixedLegDayCounter = Thirty360(Thirty360::European);
Frequency floatingLegFrequency = Semiannual;
VanillaSwap::Type type = VanillaSwap::Payer;
Rate dummyFixedRate = 0.03;
boost::shared_ptr<IborIndex> indexSixMonths(new
Euribor6M(rhTermStructure));
Date startDate = calendar.advance(settlementDate,1,Years,
floatingLegConvention);
Date maturity = calendar.advance(startDate,5,Years,
floatingLegConvention);
Schedule fixedSchedule(startDate,maturity,Period(fixedLegFrequency),
calendar,fixedLegConvention,fixedLegConvention,
DateGeneration::Forward,false);
Schedule floatSchedule(startDate,maturity,Period(floatingLegFrequency),
calendar,floatingLegConvention,floatingLegConvention,
DateGeneration::Forward,false);
boost::shared_ptr<VanillaSwap> swap(new VanillaSwap(
type, 1000.0,
fixedSchedule, dummyFixedRate, fixedLegDayCounter,
floatSchedule, indexSixMonths, 0.0,
indexSixMonths->dayCounter()));
swap->setPricingEngine(boost::shared_ptr<PricingEngine>(
new DiscountingSwapEngine(rhTermStructure)));
Rate fixedATMRate = swap->fairRate();
Rate fixedOTMRate = fixedATMRate * 1.2;
Rate fixedITMRate = fixedATMRate * 0.8;
boost::shared_ptr<VanillaSwap> atmSwap(new VanillaSwap(
type, 1000.0,
fixedSchedule, fixedATMRate, fixedLegDayCounter,
floatSchedule, indexSixMonths, 0.0,
indexSixMonths->dayCounter()));
boost::shared_ptr<VanillaSwap> otmSwap(new VanillaSwap(
type, 1000.0,
fixedSchedule, fixedOTMRate, fixedLegDayCounter,
floatSchedule, indexSixMonths, 0.0,
indexSixMonths->dayCounter()));
boost::shared_ptr<VanillaSwap> itmSwap(new VanillaSwap(
type, 1000.0,
fixedSchedule, fixedITMRate, fixedLegDayCounter,
floatSchedule, indexSixMonths, 0.0,
indexSixMonths->dayCounter()));
// defining the swaptions to be used in model calibration
std::vector<Period> swaptionMaturities;
swaptionMaturities.push_back(Period(1, Years));
swaptionMaturities.push_back(Period(2, Years));
swaptionMaturities.push_back(Period(3, Years));
swaptionMaturities.push_back(Period(4, Years));
swaptionMaturities.push_back(Period(5, Years));
std::vector<boost::shared_ptr<CalibrationHelper> > swaptions;
// List of times that have to be included in the timegrid
std::list<Time> times;
Size i;
for (i=0; i<numRows; i++) {
Size j = numCols - i -1; // 1x5, 2x4, 3x3, 4x2, 5x1
Size k = i*numCols + j;
boost::shared_ptr<Quote> vol(new SimpleQuote(swaptionVols[k]));
swaptions.push_back(boost::shared_ptr<CalibrationHelper>(new
SwaptionHelper(swaptionMaturities[i],
Period(swapLenghts[j], Years),
Handle<Quote>(vol),
indexSixMonths,
indexSixMonths->tenor(),
indexSixMonths->dayCounter(),
indexSixMonths->dayCounter(),
rhTermStructure)));
swaptions.back()->addTimesTo(times);
}
// Building time-grid
TimeGrid grid(times.begin(), times.end(), 30);
// defining the models
boost::shared_ptr<G2> modelG2(new G2(rhTermStructure));
boost::shared_ptr<HullWhite> modelHW(new HullWhite(rhTermStructure));
boost::shared_ptr<HullWhite> modelHW2(new HullWhite(rhTermStructure));
boost::shared_ptr<BlackKarasinski> modelBK(
new BlackKarasinski(rhTermStructure));
// model calibrations
std::cout << "G2 (analytic formulae) calibration" << std::endl;
for (i=0; i<swaptions.size(); i++)
swaptions[i]->setPricingEngine(boost::shared_ptr<PricingEngine>(
new G2SwaptionEngine(modelG2, 6.0, 16)));
calibrateModel(modelG2, swaptions);
std::cout << "calibrated to:\n"
<< "a = " << modelG2->params()[0] << ", "
<< "sigma = " << modelG2->params()[1] << "\n"
<< "b = " << modelG2->params()[2] << ", "
<< "eta = " << modelG2->params()[3] << "\n"
<< "rho = " << modelG2->params()[4]
<< std::endl << std::endl;
std::cout << "Hull-White (analytic formulae) calibration" << std::endl;
for (i=0; i<swaptions.size(); i++)
swaptions[i]->setPricingEngine(boost::shared_ptr<PricingEngine>(
new JamshidianSwaptionEngine(modelHW)));
calibrateModel(modelHW, swaptions);
std::cout << "calibrated to:\n"
<< "a = " << modelHW->params()[0] << ", "
<< "sigma = " << modelHW->params()[1]
<< std::endl << std::endl;
std::cout << "Hull-White (numerical) calibration" << std::endl;
for (i=0; i<swaptions.size(); i++)
swaptions[i]->setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelHW2, grid)));
calibrateModel(modelHW2, swaptions);
std::cout << "calibrated to:\n"
<< "a = " << modelHW2->params()[0] << ", "
<< "sigma = " << modelHW2->params()[1]
<< std::endl << std::endl;
std::cout << "Black-Karasinski (numerical) calibration" << std::endl;
for (i=0; i<swaptions.size(); i++)
swaptions[i]->setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelBK, grid)));
calibrateModel(modelBK, swaptions);
std::cout << "calibrated to:\n"
<< "a = " << modelBK->params()[0] << ", "
<< "sigma = " << modelBK->params()[1]
<< std::endl << std::endl;
// ATM Bermudan swaption pricing
std::cout << "Payer bermudan swaption "
<< "struck at " << io::rate(fixedATMRate)
<< " (ATM)" << std::endl;
std::vector<Date> bermudanDates;
const std::vector<boost::shared_ptr<CashFlow> >& leg =
swap->fixedLeg();
for (i=0; i<leg.size(); i++) {
boost::shared_ptr<Coupon> coupon =
boost::dynamic_pointer_cast<Coupon>(leg[i]);
bermudanDates.push_back(coupon->accrualStartDate());
}
boost::shared_ptr<Exercise> bermudanExercise(
new BermudanExercise(bermudanDates));
Swaption bermudanSwaption(atmSwap, bermudanExercise);
// Do the pricing for each model
// G2 price the European swaption here, it should switch to bermudan
bermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelG2, 50)));
std::cout << "G2: " << bermudanSwaption.NPV() << std::endl;
bermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelHW, 50)));
std::cout << "HW: " << bermudanSwaption.NPV() << std::endl;
bermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelHW2, 50)));
std::cout << "HW (num): " << bermudanSwaption.NPV() << std::endl;
bermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelBK, 50)));
std::cout << "BK: " << bermudanSwaption.NPV() << std::endl;
// OTM Bermudan swaption pricing
std::cout << "Payer bermudan swaption "
<< "struck at " << io::rate(fixedOTMRate)
<< " (OTM)" << std::endl;
Swaption otmBermudanSwaption(otmSwap,bermudanExercise);
// Do the pricing for each model
otmBermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelG2, 50)));
std::cout << "G2: " << otmBermudanSwaption.NPV() << std::endl;
otmBermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelHW, 50)));
std::cout << "HW: " << otmBermudanSwaption.NPV() << std::endl;
otmBermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelHW2, 50)));
std::cout << "HW (num): " << otmBermudanSwaption.NPV() << std::endl;
otmBermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelBK, 50)));
std::cout << "BK: " << otmBermudanSwaption.NPV() << std::endl;
// ITM Bermudan swaption pricing
std::cout << "Payer bermudan swaption "
<< "struck at " << io::rate(fixedITMRate)
<< " (ITM)" << std::endl;
Swaption itmBermudanSwaption(itmSwap,bermudanExercise);
// Do the pricing for each model
itmBermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelG2, 50)));
std::cout << "G2: " << itmBermudanSwaption.NPV() << std::endl;
itmBermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelHW, 50)));
std::cout << "HW: " << itmBermudanSwaption.NPV() << std::endl;
itmBermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelHW2, 50)));
std::cout << "HW (num): " << itmBermudanSwaption.NPV() << std::endl;
itmBermudanSwaption.setPricingEngine(boost::shared_ptr<PricingEngine>(
new TreeSwaptionEngine(modelBK, 50)));
std::cout << "BK: " << itmBermudanSwaption.NPV() << std::endl;
Real seconds = timer.elapsed();
Integer hours = int(seconds/3600);
seconds -= hours * 3600;
Integer minutes = int(seconds/60);
seconds -= minutes * 60;
std::cout << " \nRun completed in ";
if (hours > 0)
std::cout << hours << " h ";
if (hours > 0 || minutes > 0)
std::cout << minutes << " m ";
std::cout << std::fixed << std::setprecision(0)
<< seconds << " s\n" << std::endl;
return 0;
} catch (std::exception& e) {
std::cerr << e.what() << std::endl;
return 1;
} catch (...) {
std::cerr << "unknown error" << std::endl;
return 1;
}
}
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