european government bond dynamics (21.4.2017)
TRANSCRIPT
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European Government Bond
Dynamics during the Euro Crisis
Peter Schwendner
Zurich University of Applied Sciences
Martin Schüle
Thomas Ott
Martin Hillebrand
European Stability Mechanism
Disclaimer: The views expressed in this presentation are those of the authors,
and do not necessarily reflect those of the European Stability Mechanism.
MathFinance Conference 2017
Frankfurt am Main
21.4.2017
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From a Euro area governance perspective:
How homogeneous/diverse is the market? Are there clusters, blocks?
In the context of the euro crisis, does the market fear contagion risks?
From a public funding perspective:
What is the market risk of sovereign bonds in comparison to other Euro area countries?
EFSF/ESM issued bonds at the private capital market to fund the rescue programmes. How are these bonds trading in
the secondary market? Is the EFSF/ESM bond yield rather driven by asset quality or guarantee structure?
From an investor perspective:
What does the market currently assume?
Which future uncertain events are priced into bond yields and their correlations?
Which events would be «tail events»?
The euro area sovereign bond market as a whole needs attention
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Generic 10yr bonds
12 issuers: EFSF and 11 euro area sovereigns
Case Study: Euro area crisis
Greek 2015
elections
announced
Year
Convergence before
EUR introduction
Financial crisis becomes
Euro area debt crisis.
Yield volatilities spike up,
yield levels diverge.
ECB measures and
EFSF/ESM setup
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High yield levels usually come together with high yield volatilities
Absolute yield levels contain Credit spread, Liquidity premium, Duration risk premium.
High correlations indicate that investors and dealers regard markets as similar.
Correlations give an indication how much a cross-hedge can reduce market (duration) risk.
Yield correlations are essential for a bond portfolio hedge
daily bond returns ~ ( - Duration) × [yield(t)-yield(t-1)]
+ yield(t-1) × dt
Bond Carry
Duration Risk
Issuer
Current 10Yr
Yields
10Y Yields Vol
1Y window
EFSF 0.71 0.50
DE 0.38 0.55
FI 0.49 0.55
NL 0.63 0.55
AT 0.59 0.57
FR 0.95 0.61
BE 0.85 0.62
IE 1.00 0.67
ES 1.66 0.73
IT 2.15 0.81
PT 4.04 1.13
EL 7.12 2.35
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Annual correlations of daily bond yield changes 2004 - 2009
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Annual correlations of daily bond yield changes 2010-2015
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We aim to discuss yield dynamics as close to the market as possible
Therefore, we use a model free approach, based on correlations
The Pearson Correlation coefficient is defined as:
Where Xi and Yi denote the yield return time series of two bonds with n returns
Problem with correlations:
They are unstable
Hidden factors lead to spurious correlations
Yield return correlations
high
motivation
marks at
school
real life
success
?
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Method overview: from time series to networks
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
01-Jan-2010 -31-Dec-2010
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
03-Jan-2011 -30-Dec-2011
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
02-Jan-2012 -31-Dec-2012
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
01-Jan-2013 -31-Dec-2013
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
01-Jan-2014 -31-Dec-2014
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
01-Jan-2015 -28-Aug-2015
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
Bond yield time series
Correlation matrix
Bootstrap filter Filtered influence network
1990 1995 2000 2005 2010 20150
5
10
15
20
25
30
35
40
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
-0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.20
200
400
600
800
1000
1200
1400
1600
Correlation influence
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
03-Jan-2011 -30-Dec-2011
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
02-Jan-2012 -31-Dec-2012
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
01-Jan-2013 -31-Dec-2013
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
01-Jan-2014 -31-Dec-2014
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
01-Jan-2015 -28-Aug-2015
EFSFDE FI
NL AT FR BE IE
ES IT
PT GR
7
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The partial correlation measure is defined as
The partial correlation is the correlation between the residual resulting from the linear regression from X with Z
and Y with Z.
Partial correlation
8
Small absolute value would mean „Z
strongly affects correlations between X and
Y“
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Source: Kenett DY, Tumminello M, Madi A, Gur-Gershgoren G, Mantegna RN, Ben-Jacob E (2010) Dominating Clasp
of the Financial Sector Revealed by Partial Correlation Analysis of the Stock Market. PLoS ONE 5(12): e15032
The correlation influence is defined as
The average correlation influence is defined as
Partial correlation influence
9
„How much of the correlation between X
and Y is explained by their correlations to
Z?“
„How much does Z explain correlations
between X and all other markets?“
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The noise in the correlation influence estimator depends heavily on the specific pair:
DE->FR is very stable, but DE->GR is very volatile. We need a filtering concept.
We bootstrap average influences
We draw n times a sample (with replacement) from the data, using data blocks of length 1-10 days
For each sample, we calc the average influence matrix and the stddev across the samples
These standard deviations act as „blur“ indicator of the average influences
Constructing Filtered Partial Correlation Networks
abs(mean) > 3 * stddev => correlation influence is «significant»
-0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.20
200
400
600
800
1000
1200
1400
1600
Histogram of corr influence bootstrap
Finland -> Greece in 2015
stddev of the bootstrap samples
Correlation influence
fre
qu
en
cy
10
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Partial correlation networks of daily bond yield changes 2004 - 2009
2004. 2005 2006
2007 2008 2009
Blue arrows:
dominating positive
correlations =>
reinforcing movements
Red arrows: dominating
negative correlations =>
diverging movements
11
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Partial correlation networks of daily bond yield changes 2010 - 2015
Blue arrows:
dominating positive
correlations =>
reinforcing movements
Red arrows: dominating
negative correlations =>
diverging movements
2010. 2011 2012
2013 2014 2015
12
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Question:
Did the market imply contagion risk to other Euro area
countries beyond Greece?
Case Study: Negotiations of third Greek Programme
Q4-14 Q1-15 Q2-15 Q3-150
2
4
6
8
10
12
14
16
18
20
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
Timespan 10/2014 – 9/2015
10
Y B
on
d Y
ield
s in
%
Reuters, 19 April 2015:
“Greece's Varoufakis warns of
Grexit contagion”
Reuters, 27 June 2015:
“Euro zone prepared to guard
against Greek risks –
Dijsselbloem”
13
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EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
19-Jan-2015 08:00:00 -23-Jan-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
26-Jan-2015 07:00:00 -30-Jan-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
02-Feb-2015 08:00:00 -06-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
09-Feb-2015 08:00:00 -13-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
16-Feb-2015 07:00:00 -20-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
23-Feb-2015 07:00:00 -27-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
Weekly correlations of hourly bond yield changes Jan – Feb 2015
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
19-Jan-2015 08:00:00 -23-Jan-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
26-Jan-2015 07:00:00 -30-Jan-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
02-Feb-2015 08:00:00 -06-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
09-Feb-2015 08:00:00 -13-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
16-Feb-2015 07:00:00 -20-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
23-Feb-2015 07:00:00 -27-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR -0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Correlations in
weekly intervals,
using hourly yields
14
19.1.-23.1. 26.1.-30.1. 2.2.-6.2.
9.2.-13.2. 16.2.-20.2. 23.2.-27.2.
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Partial correlation networks of daily bond yield changes Jan – Feb 2015
After Syriza won Before Greek elections
19.1.-23.1. 26.1.-30.1. 2.2.-6.2.
9.2.-13.2. 16.2.-20.2. 23.2.-27.2.
Tsipras’ tour across Europe
Nervousness before Eurogroup
Brussels Tsipras confirms election
promises
Blue arrows: dominating
positive correlations =>
reinforcing movements
Red arrows: dominating
negative correlations =>
diverging movements
Greece commits to programme extension;
«Troika» become «Institutions»
15
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EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
08-Jun-2015 08:00:00 -12-Jun-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
15-Jun-2015 07:00:00 -19-Jun-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
22-Jun-2015 08:00:00 -26-Jun-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
29-Jun-2015 08:00:00 -03-Jul-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
06-Jul-2015 08:00:00 -10-Jul-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
13-Jul-2015 07:00:00 -17-Jul-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
Weekly correlations of hourly bond yield changes Jun - Jul 2015
Correlations in
weekly intervals,
using hourly yields
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
19-Jan-2015 08:00:00 -23-Jan-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
26-Jan-2015 07:00:00 -30-Jan-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
02-Feb-2015 08:00:00 -06-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
09-Feb-2015 08:00:00 -13-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
16-Feb-2015 07:00:00 -20-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
23-Feb-2015 07:00:00 -27-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR -0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
16
8.6.-12.6. 15.6.-19.6. 22.6.-26.6.
29.6.-3.7. 6.7.-10.7. 13.7.-17.7.
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Partial correlation networks of daily bond yield changes Jun - Jul 2015
Ongoing negotiations Blue arrows: dominating
positive correlations =>
reinforcing movements
Red arrows: dominating
negative correlations =>
diverging movements
Tsipras meets Putin
8.6.-12.6. 15.6.-19.6. 22.6.-26.6.
29.6.-3.7. 6.7.-10.7. 13.7.-17.7.
Greece commits to third programme
Many Eurogroup
meetings without results
Referendum announced.
ECB does not raise ELA.
Capital controls.
Referendum against
programme,
ECB still does not raise ELA
limit
Ongoing negotiations
17
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Question: Did the unexpected Brexit decision foster
fears about a further dissolution of Europe?
Case study: Brexit Referendum, June 2016
UK and Switzerland are included into the analysis
Brexit
Referendum
18
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Case study: Brexit Referendum, June 2016
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
19-Jan-2015 08:00:00 -23-Jan-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
26-Jan-2015 07:00:00 -30-Jan-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
02-Feb-2015 08:00:00 -06-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
09-Feb-2015 08:00:00 -13-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
16-Feb-2015 07:00:00 -20-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR
EF
SF
DE FI
NL
AT
FR
BE IE ES IT PT
GR
23-Feb-2015 07:00:00 -27-Feb-2015 17:00:00
EFSF
DE
FI
NL
AT
FR
BE
IE
ES
IT
PT
GR -0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
19
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Case study: Brexit Referendum, June 2016
Blue arrows: dominating
positive correlations =>
reinforcing movements
Red arrows: dominating
negative correlations =>
diverging movements
Source: https://www.fnalab.com/data/firamis/charts/public/ContagionRiskMonitor_weekly.html
20
23.5.-27.5. 30.5.-3.6. 6.6.-10.6.
13.6.-17.6. 20.6.-24.6. 27.6.-1.7.
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Questions:
What risks are priced into the European sovereign bond
market?
How do the French bonds move relative to «core
European» and «peripheral» bonds?
Case study: French presidential elections, 2017
21
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French bond spread reflects political risk
0
5
10
15
20
25
30
35
40
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
%ch
ance
of
Le P
en
win
nin
g se
cou
nd
ro
un
d
spre
ad F
R -
DE
FR Spread (left)
Oddschecker Le Pen odds
22
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What happened since 2016?
GR
PT
ES
IT
«Core
Europe»
2017 2016
Irish bonds improved, Portuguese and Italian bonds slid.
IE
23
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How is France positioned in Europe?
Bond market separation into core and periphery becomes
less and less pronounced, with the exception of Greece. 24
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Dendrograms with hourly bond yield changes - 2016
In 2016, the «European core» was still a quite pronounced
pattern in bond correlations. 25
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Dendrograms with hourly bond yield changes - 2017
In 2017, France is more correlated to Belgium and Ireland than to the
northern group of countries, but far away from the periphery. 26
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In periods of financial and political distress like 2012, the market fears contagion risk,
leading to shearing forces between a core and a periphery bloc.
Market trusts the guarantee structure of EFSF: market treats EFSF as a „core“ issuer.
Market believes in stability framework: reattachment of periphery to core since 2013,
Greece a special case.
The Brexit referendum has caused only very short-term turbulences on the bond market,
without triggering a „domino effect“.
The French bond spread moves along with the probability of a le Pen victory in the second
round, an event which would weaken the countries‘ credit.
Separation into core and periphery becomes less and less pronounced. Contagion risk
decreases.
Conclusions and Outlook
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