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Stochastic Modelling for ALM: The What,
How and Why?
Phil Bowyer, Solutions Specialist, ERS
2
1. Introduction to using stochastic models for investments
2. How to address the challenge of liability and asset interaction.
3. Uses for multi-asset product design, forward looking risk analysis
and Governance
4. ESG Product Update
Agenda
South Africa Insurance and Pensions Conference, 2017
Strategic Asset Allocation
• The last 15 years has seen the full spectrum of highs
and lows in global markets
• Lackluster returns, low interest rates
• Increasing uncertainty around political events
• Investors revisiting what is an appropriate mix of risks
for their long term financial goals and constraints.
• Goal to determine their optimal long term investment
strategy, which could be challenging due to:
• Wealth of investment options and opportunities
• Adhering to liability constraints as well as investment risk
• Capturing the possibility of “tail events” in such strategy setting
4
The Investment Decision Hierarchy
Strategic Asset Allocation
Dynamic Asset Allocation
Security Selection
South Africa Insurance and Pensions Conference, 2017
5
» Optimal Long term investment strategy
– How much should I invest in bonds, equities and property?
› This is arguably the biggest decision investors make
» SAA explains between 80% and 100% of long term fund performance
– SAA is quintessentially linked to market movements
Strategic Asset Allocation
South Africa Insurance and Pensions Conference, 2017
6
» Dynamic Asset Allocation concerned with shorter time lines
– Active management
– Capture short-term opportunities in the market
» DAA contribution of marginal long term incremental returns
Dynamic Asset Allocation
South Africa Insurance and Pensions Conference, 2017
7
Setting objectives for Initial SAA
» Understand objectives of the investor
– How much risk in the short-term is one willing take on board?
– Is a negative return in any given year a disaster?
– Is a return of –5% in any given year a disaster?
– Where is the pain threshold of yearly losses?
– Is there an absolute return target (e.g. 8%)?
– Is there a relative return target (e.g. outperform an index by
200 basis points)?
– What is the time horizon for the strategy?
– How long is the long-term? 3 years? 5 years? 100 years?
– Are there any liabilities underlying the assets?
– Is the money earmarked to be spent in any particular way in
the mandate’s foreseeable future?
58.6%22.9%
10.0%
8.6%
SAA for portfolio A
Bonds Equites Property Alternatives
South Africa Insurance and Pensions Conference, 2017
The SAA Process
Economic Assumptions Governance
Strategic View (SAA)
Monitor through
economic cycle
Tactical View (TAA
Risk & Return
Attribution
Liability Modelling
1 Introduction to using stochastic
models for investments
10
» Widely known and studied
» Mayor short coming:
– Single time horizon
» These models do not explicitly allow adjusting decisions along the planning horizon when new
information arrives
Where to Begin?Modern Portfolio Theory
South Africa Insurance and Pensions Conference, 2017
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Where to Begin?Modern Portfolio Theory
Expected
Return
Risk
South Africa Insurance and Pensions Conference, 2017
12
Portfolio Construction: MVO +
• Allows alternative views to be incorporated, but
• Weighting between data and subjective views is arbitrary
• Application often ends up being a fudge w/o sufficient transparency
Black Litterman
• Attempts to address sensitivity to assumptions
• The most common method recalculates means and covariances using different historical data windows
• This still leaves other problems unsolved, e.g. simple Gaussian distributions are often assumed
Resampling
South Africa Insurance and Pensions Conference, 2017
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Efficient Frontier MVO+
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0.0%
0.7%
1.3%
2.0%
2.6%
3.3%
4.0%
4.6%
5.3%
5.9%
6.6%
7.3%
7.9%
8.6%
9.2%
9.9%
10.6%
11.2%
11.9%
12.5%
13.2%
13.9%
14.5%
15.2%
15.8%
Po
rtfo
lio A
sse
t A
lloca
tio
n
Portfolio Volatility (% p.a)
Gilts InflationLinked Corporates P_GBP GlobalEquities
South Africa Insurance and Pensions Conference, 2017
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Efficient Frontier: BL combination of equilibrium and
views
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0.0%
0.7%
1.3%
2.0%
2.6%
3.3%
4.0%
4.6%
5.3%
5.9%
6.6%
7.3%
7.9%
8.6%
9.2%
9.9%
10.5%
11.2%
11.9%
12.5%
13.2%
13.8%
14.5%
15.2%
15.8%
Po
rtfo
lio A
sse
t A
lloca
tio
n
Portfolio Volatility (% p.a)
Gilts InflationLinked Corporates P_GBP GlobalEquities
South Africa Insurance and Pensions Conference, 2017
Scenario Generation for SAA
16
Real World ESG UsageSimple portfolio construction using one period assumptions
Advanced techniques: Multi-period, time-dependent, structural Real
World ESG
Mean Variance
Optimisation
Pension Scheme
Asset Liability
Modelling
Test portfolio in an Asset
Liability Model
Capturing and
Analysing Tail Risks
Retail – annuity income
and income drawdown
Dynamic asset
allocation
Accounting
constraints
Returns Correlations Liability proxy
South Africa Insurance and Pensions Conference, 2017
17
Economic Scenario Generator What is it?
» Collection of stochastic models which are structured and correlated
together in such a way that they collectively produce plausible and
sensible projections of risk factors
» This collection of models can produce many “trials”, each trial
representing the movement of the risk factors across the time horizon
South Africa Insurance and Pensions Conference, 2017
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In a Real-World framework, the modelling goal is to assign realistic probabilities to a set of future outcomes,
effectively producing forecasts. The advantage of this is quantifying levels of uncertainty and risk, allowing to
derive meaningful and quantitative answers to genuine risk management questions, such as:
» How severe can my losses be under my current strategic asset allocation?
» What are the range of possible outcomes?
» What if my yields were to drop, how does this impact my portfolio?
» What are a range of candidate portfolios for my client’s return and risk appetite?
Economic Scenario GeneratorWhat is it?
South Africa Insurance and Pensions Conference, 2017
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Portfolio Construction
» Portfolio modelling with an ESG provides the ability to:
– The ability to capture tail risk events
– Dynamic correlation between various risk factors
– Assess the most useful metrics of risk and return
– Create bespoke portfolios to satisfy complex requirements and
constraints
– Compare portfolio performance in a range of market conditions
– Analyse portfolios on a multi-timestep basis
– Include cashflows in portfolio projections
– Monitor Fund Risk
South Africa Insurance and Pensions Conference, 2017
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Monitoring Fund Risk
South Africa Insurance and Pensions Conference, 2017
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Monitoring Fund Risk
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» VaR
» Conditional VaR
» Tracking error
» Shortfall
» Liability
» ….
» Any output/risk metric to suit the investors requirements.
Optimising more than Standard Deviation Several Options
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Portfolio Construction: Generic
Optimisation
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Portfolio Construction: Generic
Optimisation
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Strategic Asset Allocation : The Need For A
Stochastic Scenario Generator
Objective MV Asset Model Scenario Generator
Diversify across risks
Where risk are defined with respect to
liabilities?
Aligns level of risk with risk tolerance ?
Bias towards risks which are expected
improve the overall portfolio performance
Regularly rebalance in line with evolving
liabilities?
Set a clear benchmark for TAA, and other
value adders
Set realistic expectations given current market
conditions?
South Africa Insurance and Pensions Conference, 2017
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Using ESG for SAA & InvestmentKey Benefits (Client)
» Increased client understanding and confidence
» Quick recalibration of models to account for new economic conditions
» Imposing client specific views
» Ownership of scenario generator and entire SAA process
South Africa Insurance and Pensions Conference, 2017
Case Studies
28
Case Study – Insurance ALM: Duration Matching» Large US Life Insurer
» Looking to rebalance asset portfolios
on each line of business to target
liability matching duration
» Simultaneously looking to find
portfolios that minimise tail risk for PV
Earnings and maximise average PV of
earnings
» Strategies include rebalancing rules
» For each investment strategy run
a set of stochastic real-world
scenarios
» Calculate PV of earnings for each
scenario
South Africa Insurance and Pensions Conference, 2017
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Case Study – DB Scheme SAA accounting for
De-Risking Journey Plan
» Large Government backed DB scheme
» Objective was to find optimal SAA
accounting for a de-risking journey plan for
DB scheme.
» Needed to account for a dynamic investment
strategy, i.e. altering asset SAA throughout
projection based on scheme Funding Level
» Compare multiple SAAs and de-risking over
a range of scheme metrics, e.g. contribution
level, Funding Level.
» Compare risk profile of strategies through
risk decomposition to understand
sensitivities.
South Africa Insurance and Pensions Conference, 2017
How to address the challenge of
liability and asset interaction.2
31
» Exploit power of Moody’s Analytics ESG for asset allocation, portfolio design and ALM applications
» Make it easier for clients to use our models to address range of investment planning problems:
asset allocation, liability-based portfolio design & optimization, management communication, pension ALM
– Evaluate impact of investment strategy on capital and other solvency balance sheet metrics
– Optimise asset portfolios, investment strategy & risk management process to business & capital objectives
» Improve alignment & collaboration between Actuarial and Investment departments
» Flexible modelling and API supports integration into client’s business process: capital market assumptions,
investment objectives, portfolio rebalancing rules, constraints, data & model granularity requirements.
» Access Moody’s Analytics comprehensive library of economic content and insight
Client Benefits
Portfolio Module
South Africa Insurance and Pensions Conference, 2017
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The Investment Problem
Managed Portfolio Models
Liabilities
Assets
Economic Risk Factors:
credit, rates, inflation
Asset Specification
Multiple multi-year
liability cashflows
Investment targets:
earnings, return, cashflows, risk,
duration, book yield
Time dependent or dynamic
rebalancing
Market Value
Earnings
Realised Gains, Impairment
Capital
Duration
Portfolio Transactions & Costs
South Africa Insurance and Pensions Conference, 2017
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Apply static or dynamic
rebalancing rules between assets
Model Structure
Managed Portfolio Models
Cash
Account
Rebalancing Rules
Real Estate Equity High Yield Short Duration Credit Long Duration Credit
• Portfolio of direct
Japanese property
investments
• Diversified across
sectors
• Benchmarked against
IPD UK Index
• Portfolio of JPY Stocks
• Diversified across
sectors
• Benchmarked against
MSCI UK Index
• Portfolio of Investment
grade JPY long dated
corporate bonds
• Min credit class BBB
• Duration target 12-15Y
• Portfolio of Investment
grade JPY short dated
corporate bonds
• Min credit class BBB
• Duration target 3-5Y
• Portfolio of Global High
Yield corporate bonds
• Credit class CC - BBB
• Duration target 3-5Y
Liabilities
South Africa Insurance and Pensions Conference, 2017
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Model Structure
Managed Portfolio Models
LiabilitiesCash
Account
Rebalancing Rules
Real Estate Equity High Yield Long Duration Credit
HoldingsCash
Account
Sell
Rules
Buy
Rules
Rebalancing Rules
Sell on
DemandInitial holdings of each asset
specified in fair (market) and
book value terms
Asset Level transaction
management & investment
strategy
Direct investment
cashflows to pay liabilities
Fair and book values for
individual securities,
asset indices or
portfolios. Balance sheet
and P&L measures.
Apply on-demand sell orders to
create liquidity for rebalancing
South Africa Insurance and Pensions Conference, 2017
3 ESG Product Update
36
Market Consistent Interest Rate Models
» MC LMM+ 10% Displacement Calibrations
– During the Q3 Delivery we will release additional LMM+ calibrations with 10% displacement for a subset of economies
– MC Premium, MC Solvency II and MC Standard calibrations will remain unaffected and use a 45% displacement
– Beta calibrations for end Dec 2016 & June 2017 covering CHF, EUR, GBP, JPY and USD are available on the
Customer Portal
– The recently published document ‘Market Consistent LMM+ Nominal Yield Curve Calibrations with a Semi-Static
Displacement Parameter’ provides more details on the rationale for the introduction of these calibrations
» MC Displaced E2FBK Calibrations
– From Q3 we will be adding MC displaced E2FBK calibrations to the MC Standard calibration service for CHF, CNY,
EUR, GBP, JPY, USD and ZAR
– End June 2017 beta MC displaced E2FBK calibrations for the same economies are already available on the Customer
Portal
Displacement parameter choice
South Africa Insurance and Pensions Conference, 2017
37
Planned Changes in 2018
» Medium-term interest rate and inflation assumptions review
– “Real World ESG Research Update” session will provide insight into this project
– Review paths of interest rate and inflation models to better reflect expectations over the medium term on an economy
specific basis.
– Aim to both fit index linked bonds and target inflation paths accurately
– Scope is currently RW, however, devised methodology could be used in MC calibrations.
» 1-Year VaR Corporate Spread Modelling
– We plan to review the methodology for setting corporate spread volatility targets. This could result in the eventual
withdrawal of G2 Single Term Premium calibrations and replacement with G2 Dual term premium calibrations.
» Market Consistent Hull White Calibrations
South Africa Insurance and Pensions Conference, 2017
Product Update
39
Recent and Upcoming Releases
Dec 2016
Beta – Preview Release for client feedback
Gold – Production Ready Release
SG 8.5.0
May 2017
SG 8.5.1
June 2017
ESG Automation Module 3.3.1
Calibration Tools 4.8.0:
RW Equity Tool
Aug 2017
Portfolio Projection Module (Beta)
Calibration Tools 4.9.0:
FX Calibration Tool
Nov 2017
ESG 9.0.0 (Gold)/Portfolio
Projection Module
Asset Scenario Generator (Beta)
Q1 2018
ESG 9.1.0 + DB ALM
Calibration Tools 5.0.0:
API Phase 1
Q2/Q3 2018
Asset Scenario
Generator (Gold)
Scenario Hub
In the past 3.5 years, we’ve had 30 significant releases of ESG
software:11 ESG & RSG, 10 Calibration Tools, 9 Automation Module
South Africa Insurance and Pensions Conference, 2017
40
Developments Highlights
» Process streamlining features
– Processors feature
– New Analysis Tests (Asset Return, Tail Dependence)
– Charting
– Create .BHC files from ESG
– Bulk import improvements
– Yield Curve Builder in ESG Automation Module
» Modelling enhancements
– SVJD Jump Correlations
– Daily step modelling
– Copula functionality in ESG
– Actuarial Rate and Equity models
– New deterministic re-calibration options for 2F
Vasicek
– Strong Mean Reversion in E2FBK
– New risk drivers in RSG
– Addable Macro Models
– Credit Transition Probability Outputs
» Miscellaneous
– Automation API
– Hull-White compatibility in ESG AM
– Custom Stress method in ESG AM
– G3 Credit model in ESG AM
– Calibration Tools: 64bit compatibility with excel
– Stochastic Interest Adjustment for equity calibrations
under LMM+ and 2F Hull-White
– Market Consistent Hull-White calibration feature in the
Swaption Tool
South Africa Insurance and Pensions Conference, 2017
41
Calibration Tools 4.8.0Real World Equity Tool
Create an Equity calibration file using one tool
Calibrate the correlation between equities and
interest rates. Run Cycle button runs ESG
validations to improve quality of fit.
Calibrate equity-equity correlations using the factor
model. New analytical fit method speeds up
calibration.
Calibrate skew, kurtosis and volatility of equity
return distributions using SVJD. Import Assets
button makes it quicker to initialise the tool.
Equity Correlations (Factor Calibration) SVJD Calibration
Equity-Bond Correlations
Calibrate child equity asset volatility, return and
correlation with parent. The calibration method is
chosen based on the available inputs.
Child Equity Calibration
Workflow automatically moves data between modules
South Africa Insurance and Pensions Conference, 2017
42
Calibration Tool 4.9.0FX Calibration Tool
1Target FX level at multiple horizons. The tool
is capable of giving an exact fit to FX level
targets for multiple horizons.
2Target FX volatility. In addition to targeting the
level of FX rates, the tool can also target FX
volatility.
3IRP and PPP models supported. Both the
Interest Rate Parity and Purchasing Power
Parity models are supported so you won’t need
to change model when using the FX Tool.
0
0.5
1
1.5
2
2.5
3
3.5
0 1 2 3 4 5 6 7 8 9 10
No
min
al
FX
Lev
el
Time steps (years)
South Africa Insurance and Pensions Conference, 2017
43
Software Support and End-of-Life schedule
ESG Versions
» ESG 8.2.0 was retired in July 2017
» ESG 8.2.2 will be retired in December 2017
Calibration Tools
» CT 4.5.0 was retired in July 2017
» CT 4.5.1 will be retired in December 2017
ESG Automation Module
» ESG AM 3.1.0 was retired in August 2017
» ESG AM 3.1.1 will be retired in December 2017
Full details can be
found on the
Client Support
Web.
South Africa Insurance and Pensions Conference, 2017
Looking AheadInformation regarding products, features,
specifications and functionality in the ERS
Insurance product roadmaps is intended to
outline general product direction but is not
guaranteed. Future products will be sold
only when and if available. Moody’s
Analytics reserves our right to change the
development, release, and timing of features
and functionality discussed in our product
roadmap at any time.
45
Moody’s Cloud Platform
The MA-wide Cloud Platform (based on AWS and Azure)
are now in ‘Production’ mode.
New Products
New Insurance products are now purpose-built for
Cloud or Software-as-a-Service (SaaS) deployment
(e.g. Portfolio Risk Analytics, RiskIntegrity™ Insight).
Cloud Virtual Machines
A number of users install the ESG on cloud-hosted
VMs (AWS or Azure) with cloud based HPC GRIDs
ESG Software-as-a-Service
We’ll be building-out a suite of SaaS Scenario Generation solutions.
We are keen to understand users’ specific requirements.
Cloud and SaaS
South Africa Insurance and Pensions Conference, 2017
• Cloud Hosted
• Enterprise features
• API
• User Experience
One place for all
your Scenario
Generation needs!
Scenario Hub
47
Scenario HubOverview
Cloud hosted
The application will be hosted on Microsoft Azure Cloud,
so the only IT requirement for users will be to have
access to a web browser. Resources will be scalable
based on user needs.
Enterprise features
The application will allow users within a client workspace
to share projects. Client admin users will be able to
specify Read-Write rights. All actions will be captured
within an audit log.
API
The application will come with its own Application
Programming Interface allowing it to be connected with
other tools.
Improved User Experience
Users do not have to be ESG experts. The application
will do all the heavy lifting when it comes to modelling
allowing users to focus on other added value activities.
Calibration Capabilities
Users will be able to augment standard calibrations to hit
their own targets or views. The underlying calibration
framework will be the same as the one used by MA for
quarterly calibrations.
Calibration Library
Based on user entitlements, MA standard calibrations will
be accessible in user accounts every quarter. Users will
be able to store their own calibrations as well.
Scenario Hub is the technology and analytics platform that we use to deliver our scenario-
based SaaS solutions.
South Africa Insurance and Pensions Conference, 2017
48
Additional Development Themes
1ESG Performance. We have identified a number of
areas where performance can be improved [RNG,
model data structures, C#, thread modes, …]
2Calibration API. We are working on formalizing a
Calibration Tool API – starting with YCB, MC Equity
and MC Swaptions.
3Implied Volatility Projection. We have developed a
new approach to projecting implied volatility. This uses
the new Processors feature to create better dynamics.
South Africa Insurance and Pensions Conference, 2017
Thank you
Questions?
50
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South Africa Insurance and Pensions Conference, 2017