TrinomialTreeEvolution.java
- package org.drip.sample.hullwhite;
- import org.drip.analytics.date.*;
- import org.drip.dynamics.hullwhite.*;
- import org.drip.function.r1tor1.FlatUnivariate;
- import org.drip.numerical.common.FormatUtil;
- import org.drip.sequence.random.BoxMullerGaussian;
- import org.drip.service.env.EnvManager;
- import org.drip.state.identifier.FundingLabel;
- /*
- * -*- mode: java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- */
- /*!
- * Copyright (C) 2019 Lakshmi Krishnamurthy
- * Copyright (C) 2018 Lakshmi Krishnamurthy
- * Copyright (C) 2017 Lakshmi Krishnamurthy
- * Copyright (C) 2016 Lakshmi Krishnamurthy
- * Copyright (C) 2015 Lakshmi Krishnamurthy
- *
- * This file is part of DROP, an open-source library targeting risk, transaction costs, exposure, margin
- * calculations, valuation adjustment, and portfolio construction within and across fixed income,
- * credit, commodity, equity, FX, and structured products.
- *
- * https://lakshmidrip.github.io/DROP/
- *
- * DROP is composed of three modules:
- *
- * - DROP Analytics Core - https://lakshmidrip.github.io/DROP-Analytics-Core/
- * - DROP Portfolio Core - https://lakshmidrip.github.io/DROP-Portfolio-Core/
- * - DROP Numerical Core - https://lakshmidrip.github.io/DROP-Numerical-Core/
- *
- * DROP Analytics Core implements libraries for the following:
- * - Fixed Income Analytics
- * - Asset Backed Analytics
- * - XVA Analytics
- * - Exposure and Margin Analytics
- *
- * DROP Portfolio Core implements libraries for the following:
- * - Asset Allocation Analytics
- * - Transaction Cost Analytics
- *
- * DROP Numerical Core implements libraries for the following:
- * - Statistical Learning
- * - Numerical Optimizer
- * - Spline Builder
- * - Algorithm Support
- *
- * Documentation for DROP is Spread Over:
- *
- * - Main => https://lakshmidrip.github.io/DROP/
- * - Wiki => https://github.com/lakshmiDRIP/DROP/wiki
- * - GitHub => https://github.com/lakshmiDRIP/DROP
- * - Repo Layout Taxonomy => https://github.com/lakshmiDRIP/DROP/blob/master/Taxonomy.md
- * - Javadoc => https://lakshmidrip.github.io/DROP/Javadoc/index.html
- * - Technical Specifications => https://github.com/lakshmiDRIP/DROP/tree/master/Docs/Internal
- * - Release Versions => https://lakshmidrip.github.io/DROP/version.html
- * - Community Credits => https://lakshmidrip.github.io/DROP/credits.html
- * - Issues Catalog => https://github.com/lakshmiDRIP/DROP/issues
- * - JUnit => https://lakshmidrip.github.io/DROP/junit/index.html
- * - Jacoco => https://lakshmidrip.github.io/DROP/jacoco/index.html
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- *
- * You may obtain a copy of the License at
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- /**
- * <i>TrinomialTreeEvolution</i> demonstrates the Construction and Usage of the Hull-White Trinomial Tree and
- * the Eventual Evolution of the Short Rate on it.
- *
- * <br><br>
- * <ul>
- * <li><b>Module </b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/AnalyticsCore.md">Analytics Core Module</a></li>
- * <li><b>Library</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/FixedIncomeAnalyticsLibrary.md">Fixed Income Analytics Library</a></li>
- * <li><b>Project</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/src/main/java/org/drip/sample/README.md">Sample</a></li>
- * <li><b>Package</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/src/main/java/org/drip/sample/hullwhite/README.md">Hull-White 1F Dynamics</a></li>
- * </ul>
- * <br><br>
- *
- * @author Lakshmi Krishnamurthy
- */
- public class TrinomialTreeEvolution {
- private static final SingleFactorStateEvolver HullWhiteEvolver (
- final String strCurrency,
- final double dblSigma,
- final double dblA,
- final double dblStartingForwardRate)
- throws Exception
- {
- return new SingleFactorStateEvolver (
- FundingLabel.Standard (strCurrency),
- dblSigma,
- dblA,
- new FlatUnivariate (dblStartingForwardRate),
- new BoxMullerGaussian (
- 0.,
- 1.
- )
- );
- }
- private static final void DumpMetrics (
- final TrinomialTreeTransitionMetrics hwtm)
- throws Exception
- {
- System.out.println ("\t| [" + new JulianDate (hwtm.initialDate()) + " -> " +
- new JulianDate (hwtm.terminalDate()) + "] => " +
- FormatUtil.FormatDouble (hwtm.expectedTerminalX(), 1, 4, 1.) + " | " +
- FormatUtil.FormatDouble (Math.sqrt (hwtm.xVariance()), 1, 2, 100.) + "% | " +
- FormatUtil.FormatDouble (hwtm.xStochasticShift(), 1, 4, 1.) + " || " +
- FormatUtil.FormatDouble (hwtm.probabilityUp(), 1, 4, 1.) + " | " +
- FormatUtil.FormatDouble (hwtm.upNodeMetrics().x(), 1, 4, 1.) + " | " +
- FormatUtil.FormatDouble (hwtm.upNodeMetrics().shortRate(), 1, 2, 100.) + "% || " +
- FormatUtil.FormatDouble (hwtm.probabilityDown(), 1, 4, 1.) + " | " +
- FormatUtil.FormatDouble (hwtm.downNodeMetrics().x(), 1, 4, 1.) + " | " +
- FormatUtil.FormatDouble (hwtm.downNodeMetrics().shortRate(), 1, 2, 100.) + "% || " +
- FormatUtil.FormatDouble (hwtm.probabilityStay(), 1, 4, 1.) + " | " +
- FormatUtil.FormatDouble (hwtm.stayNodeMetrics().x(), 1, 4, 1.) + " | " +
- FormatUtil.FormatDouble (hwtm.stayNodeMetrics().shortRate(), 1, 2, 100.) + "% ||"
- );
- }
- private static final void TreeHeader (
- final String strEvolutionComment)
- throws Exception
- {
- System.out.println ("\n\n\t|----------------------------------------------------------------------------------------------------------------------------------------------------||");
- System.out.println ("\t| ||");
- System.out.println (strEvolutionComment);
- System.out.println ("\t| --------------------------------------------------- ||");
- System.out.println ("\t| ||");
- System.out.println ("\t| L->R: ||");
- System.out.println ("\t| ||");
- System.out.println ("\t| Initial Date ||");
- System.out.println ("\t| Final Date ||");
- System.out.println ("\t| Expected Final X ||");
- System.out.println ("\t| X Volatility (%) ||");
- System.out.println ("\t| X Stochastic Shift ||");
- System.out.println ("\t| Move-Up Probability ||");
- System.out.println ("\t| Move-Up X Node Value ||");
- System.out.println ("\t| Move-Up Short Rate ||");
- System.out.println ("\t| Move-Down Probability ||");
- System.out.println ("\t| Move-Down X Node Value ||");
- System.out.println ("\t| Move-Down Short Rate ||");
- System.out.println ("\t| Stay Probability ||");
- System.out.println ("\t| Stay X Node Value ||");
- System.out.println ("\t| Stay Short Rate ||");
- System.out.println ("\t| ||");
- System.out.println ("\t|----------------------------------------------------------------------------------------------------------------------------------------------------||");
- }
- public static final void main (
- final String[] astrArgs)
- throws Exception
- {
- EnvManager.InitEnv ("");
- JulianDate dtSpot = DateUtil.Today();
- String strCurrency = "USD";
- double dblStartingShortRate = 0.05;
- double dblSigma = 0.01;
- double dblA = 1.;
- SingleFactorStateEvolver hw = HullWhiteEvolver (
- strCurrency,
- dblSigma,
- dblA,
- dblStartingShortRate
- );
- int iSpotDate = dtSpot.julian();
- int iFinalDate = dtSpot.addMonths (6).julian();
- int iInitialDate = iSpotDate;
- TrinomialTreeTransitionMetrics hwtm = null;
- TreeHeader ("\t| Hull-White Trinomial Tree Upwards Evolution Metrics ||");
- while (iInitialDate < iFinalDate) {
- DumpMetrics (hwtm =
- hw.evolveTrinomialTree (
- iSpotDate,
- iInitialDate,
- iFinalDate,
- null == hwtm ? null : hwtm.upNodeMetrics()
- )
- );
- iInitialDate += 10;
- }
- System.out.println ("\t|----------------------------------------------------------------------------------------------------------------------------------------------------||");
- hwtm = null;
- iInitialDate = iSpotDate;
- TreeHeader ("\t| Hull-White Trinomial Tree Downwards Evolution Metrics ||");
- while (iInitialDate < iFinalDate) {
- DumpMetrics (hwtm =
- hw.evolveTrinomialTree (
- iSpotDate,
- iInitialDate,
- iFinalDate,
- null == hwtm ? null : hwtm.downNodeMetrics()
- )
- );
- iInitialDate += 10;
- }
- System.out.println ("\t|----------------------------------------------------------------------------------------------------------------------------------------------------||");
- hwtm = null;
- iInitialDate = iSpotDate;
- TreeHeader ("\t| Hull-White Trinomial Tree Stay-Put Evolution Metrics ||");
- while (iInitialDate < iFinalDate) {
- DumpMetrics (hwtm =
- hw.evolveTrinomialTree (
- iSpotDate,
- iInitialDate,
- iFinalDate,
- null == hwtm ? null : hwtm.stayNodeMetrics()
- )
- );
- iInitialDate += 10;
- }
- System.out.println ("\t|----------------------------------------------------------------------------------------------------------------------------------------------------||");
- EnvManager.TerminateEnv();
- }
- }