public void testEuropeanGreeks()
{
// Testing dividend European option greeks...
SavedSettings backup = new SavedSettings();
Dictionary <string, double> calculated = new Dictionary <string, double>(),
expected = new Dictionary <string, double>(),
tolerance = new Dictionary <string, double>();
tolerance["delta"] = 1.0e-5;
tolerance["gamma"] = 1.0e-5;
tolerance["theta"] = 1.0e-5;
tolerance["rho"] = 1.0e-5;
tolerance["vega"] = 1.0e-5;
Option.Type[] types = { Option.Type.Call, Option.Type.Put };
double[] strikes = { 50.0, 99.5, 100.0, 100.5, 150.0 };
double[] underlyings = { 100.0 };
double[] qRates = { 0.00, 0.10, 0.30 };
double[] rRates = { 0.01, 0.05, 0.15 };
int[] lengths = { 1, 2 };
double[] vols = { 0.05, 0.20, 0.40 };
DayCounter dc = new Actual360();
Date today = Date.Today;
Settings.setEvaluationDate(today);
SimpleQuote spot = new SimpleQuote(0.0);
SimpleQuote qRate = new SimpleQuote(0.0);
Handle <YieldTermStructure> qTS = new Handle <YieldTermStructure>(Utilities.flatRate(qRate, dc));
SimpleQuote rRate = new SimpleQuote(0.0);
Handle <YieldTermStructure> rTS = new Handle <YieldTermStructure>(Utilities.flatRate(rRate, dc));
SimpleQuote vol = new SimpleQuote(0.0);
Handle <BlackVolTermStructure> volTS = new Handle <BlackVolTermStructure>(Utilities.flatVol(vol, dc));
for (int i = 0; i < types.Length; i++)
{
for (int j = 0; j < strikes.Length; j++)
{
for (int k = 0; k < lengths.Length; k++)
{
Date exDate = today + new Period(lengths[k], TimeUnit.Years);
Exercise exercise = new EuropeanExercise(exDate);
List <Date> dividendDates = new List <Date>();
List <double> dividends = new List <double>();
for (Date d = today + new Period(3, TimeUnit.Months);
d < exercise.lastDate();
d += new Period(6, TimeUnit.Months))
{
dividendDates.Add(d);
dividends.Add(5.0);
}
StrikedTypePayoff payoff = new PlainVanillaPayoff(types[i], strikes[j]);
BlackScholesMertonProcess stochProcess = new BlackScholesMertonProcess(new Handle <Quote>(spot),
qTS, rTS, volTS);
IPricingEngine engine = new AnalyticDividendEuropeanEngine(stochProcess);
DividendVanillaOption option = new DividendVanillaOption(payoff, exercise, dividendDates,
dividends);
option.setPricingEngine(engine);
for (int l = 0; l < underlyings.Length; l++)
{
for (int m = 0; m < qRates.Length; m++)
{
for (int n = 0; n < rRates.Length; n++)
{
for (int p = 0; p < vols.Length; p++)
{
double u = underlyings[l];
double q = qRates[m],
r = rRates[n];
double v = vols[p];
spot.setValue(u);
qRate.setValue(q);
rRate.setValue(r);
vol.setValue(v);
double value = option.NPV();
calculated["delta"] = option.delta();
calculated["gamma"] = option.gamma();
calculated["theta"] = option.theta();
calculated["rho"] = option.rho();
calculated["vega"] = option.vega();
if (value > spot.value() * 1.0e-5)
{
// perturb spot and get delta and gamma
double du = u * 1.0e-4;
spot.setValue(u + du);
double value_p = option.NPV(),
delta_p = option.delta();
spot.setValue(u - du);
double value_m = option.NPV(),
delta_m = option.delta();
spot.setValue(u);
expected["delta"] = (value_p - value_m) / (2 * du);
expected["gamma"] = (delta_p - delta_m) / (2 * du);
// perturb risk-free rate and get rho
double dr = r * 1.0e-4;
rRate.setValue(r + dr);
value_p = option.NPV();
rRate.setValue(r - dr);
value_m = option.NPV();
rRate.setValue(r);
expected["rho"] = (value_p - value_m) / (2 * dr);
// perturb volatility and get vega
double dv = v * 1.0e-4;
vol.setValue(v + dv);
value_p = option.NPV();
vol.setValue(v - dv);
value_m = option.NPV();
vol.setValue(v);
expected["vega"] = (value_p - value_m) / (2 * dv);
// perturb date and get theta
double dT = dc.yearFraction(today - 1, today + 1);
Settings.setEvaluationDate(today - 1);
value_m = option.NPV();
Settings.setEvaluationDate(today + 1);
value_p = option.NPV();
Settings.setEvaluationDate(today);
expected["theta"] = (value_p - value_m) / dT;
// compare
foreach (KeyValuePair <string, double> it in calculated)
{
string greek = it.Key;
double expct = expected [greek],
calcl = calculated[greek],
tol = tolerance [greek];
double error = Utilities.relativeError(expct, calcl, u);
if (error > tol)
{
REPORT_FAILURE(greek, payoff, exercise,
u, q, r, today, v,
expct, calcl, error, tol);
}
}
}
}
}
}
}
}
}
}
}
