International International Diversification Gains Diversification Gains and Home Bias in and Home Bias in Banking Banking Alicia García-Herrero (BIS) Alicia García-Herrero (BIS) Francisco Vázquez (IMF) Francisco Vázquez (IMF) Conference on Mergers and Acquisitions of Financial Institutions L. William Seidman Center, Arlington November 30-December 1, 2007
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International Diversification Gains and Home Bias in Banking Alicia García-Herrero (BIS) Francisco Vázquez (IMF) Conference on Mergers and Acquisitions.
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International International Diversification Gains Diversification Gains
Conference on Mergers and Acquisitions of Financial Institutions
L. William Seidman Center, Arlington
November 30-December 1, 2007
OverviewOverview
MotivationMotivation ObjectivesObjectives Related literatureRelated literature Overview of the sampleOverview of the sample Methodological aspects and resultsMethodological aspects and results
Econometric estimatesEconometric estimates Portfolio modelPortfolio model
ConclusionsConclusions
MotivationMotivation
Dramatic increase in FDI in the banking Dramatic increase in FDI in the banking sector since the mid-ninetiessector since the mid-nineties
International banks would likely obtain International banks would likely obtain cross-country diversification benefitscross-country diversification benefits
International diversification in banking is International diversification in banking is barely understoodbarely understood
International diversification effects not International diversification effects not taking into account in the Basel II standard taking into account in the Basel II standard approachapproach
LOCAL CLAIMS CONSOLIDATED INTERNATIONAL CLAIMS OF REPORTING BANKS ON INDIVIDUAL COUNTRIES
Synchronization of Macroeconomic Synchronization of Macroeconomic ConditionsConditions
Higher Between Industrial CountriesHigher Between Industrial Countries
Mean Min. Max. No. Obs.GDP Growth
Industrial vs. Industrial 0.413 -0.247 0.997 210Industrial vs. Emerging 0.126 -0.603 0.929 1386Emerging vs. Emerging 0.066 -0.872 0.957 2145
Government Bond YieldsIndustrial vs. Industrial 0.725 -0.282 0.997 134Industrial vs. Emerging 0.255 -1.000 1.000 189Emerging vs. Emerging 0.247 -1.000 1.000 69
Growth Correlations, Cumulative Probabilities Growth Correlations, Cumulative Probabilities by Country Groupsby Country Groups
0.2
.4.6
.81
-1 -.5 0 .5 1GROWTH
Adv_Adv Adv_Eme0
.2.4
.6.8
1
-1 -.5 0 .5 1GROWTH
Adv_Adv Eme_Eme
0.2
.4.6
.81
-1 -.5 0 .5 1GROWTH
Adv_Eme Eme_CEE
0.2
.4.6
.81
-1 -.5 0 .5 1GROWTH
Adv_Eme Eme_Latin
0.2
.4.6
.81
-1 -.5 0 .5 1GROWTH
Adv_Eme Eme_Asia
ObjectivesObjectives Explore the risk-return effects of Explore the risk-return effects of
international diversification in bankinginternational diversification in banking
Are parent banks with a larger share of Are parent banks with a larger share of their assets allocated to foreign subsidiaries their assets allocated to foreign subsidiaries able to obtain larger risk-adjusted profits?able to obtain larger risk-adjusted profits?
Is geographical concentration detrimental Is geographical concentration detrimental to the risk-adjusted profitability of to the risk-adjusted profitability of international banks?international banks?
Use portfolio theory as a benchmark to Use portfolio theory as a benchmark to analyze the international allocation of analyze the international allocation of bank assetsbank assets
How does the actual allocation of bank How does the actual allocation of bank assets compare with the “optimal frontier”assets compare with the “optimal frontier”
Related LiteratureRelated Literature Portfolio theory: (MarkovitzPortfolio theory: (Markovitz 1952, 1959) 1952, 1959)
International portfolio diversification: International portfolio diversification: (Grubel, 1968; Levy and Sarnat, 1970; (Grubel, 1968; Levy and Sarnat, 1970; Lessard, 1973)Lessard, 1973)
Geographical local diversification in Geographical local diversification in banking: (Acharya, Hasan, and Saunders, banking: (Acharya, Hasan, and Saunders, 2002; Morgan and Samolyk, 2003)2002; Morgan and Samolyk, 2003)
International diversification in banking: International diversification in banking: (Griffith-Jones, Segoviano and Spratt, 2002; (Griffith-Jones, Segoviano and Spratt, 2002; Buch, Discroll and Ostrgaard, 2005)Buch, Discroll and Ostrgaard, 2005)
Omitted variable biasOmitted variable bias The dependent variable is computed from the The dependent variable is computed from the
consolidated financial statements of parent consolidated financial statements of parent banksbanks Captures risk-return gains from local operations Captures risk-return gains from local operations
abroad abroad plusplus those of cross border operations those of cross border operations If cross-border and local operations are If cross-border and local operations are
The results could also be driven by The results could also be driven by unobserved differences across banksunobserved differences across banks Differences in business strategies, quality of risk Differences in business strategies, quality of risk
management, etc.management, etc. We control by exploiting differences in We control by exploiting differences in
information content between consolidated and information content between consolidated and unconsolidated financial statementsunconsolidated financial statements
Robustness Check: Controlling for Robustness Check: Controlling for Parent Bank IdiosyncrasiesParent Bank Idiosyncrasies
-5
0
5
10
Dif
f. R
isk-
Adj
uste
d R
OA
0 10 20 30 40Percent Assets in Industrial Countries
Other Industrial Countries
-5
0
5
10
Dif
f. R
isk-
Adj
uste
d R
OA
0 5 10 15 20 25Percent Assets in Emerging Countries
Emerging Countries
-5
0
5
10
Dif
f. R
isk-
Adj
uste
d R
OA
60 70 80 90 100Percent Assets at Home
Home Countries
Difference in Risk-Adjusted ROA (Consolidated minus Unconsolidated)
Dependent: Difference of Risk-Normalized ROA (Consol-Unconsol)[1] [2] [3]
Diff. in Risk-Normalized
ROA
Diff. in Risk-Normalized
ROA
Diff. in Risk-Normalized
ROAPercent assets in home country (coef_1) -0.345 0.406 0.610
[0.289] [0.496] [0.554]Percent assets in industrial (coef_2) 4.191 4.328 4.343
[1.785]** [1.724]** [1.807]**Percent assets in emerging (coef_3) 3.753 4.918 5.876
[1.059]*** [0.972]*** [1.268]***Herfindhal index within industrial -0.802 -0.823
[0.645] [0.685]Herfindhal index within emerging -0.320
F-Stat 17.67 28.41 19.63Prob > F = 0.000 0.000 0.000
Robust standard errors in brackets* significant at 10%; ** significant at 5%; *** significant at 1%
Methodology: 2) Portfolio modelMethodology: 2) Portfolio model
Use portfolio theory as a normative benchmarkUse portfolio theory as a normative benchmark Treat foreign subsidiaries as single components of Treat foreign subsidiaries as single components of
the world portfolio of international banks the world portfolio of international banks Caveats:Caveats:
Transaction costs of entry/exit a given countryTransaction costs of entry/exit a given country Bank subsidiaries may not be perfect substitutesBank subsidiaries may not be perfect substitutes Time dimension is not balanced—difficult to Time dimension is not balanced—difficult to
compute variances and covariances of returns compute variances and covariances of returns across subsidiariesacross subsidiaries
Treatment:Treatment: Focus on portfolio optimization within the observed Focus on portfolio optimization within the observed
set of subsidiaries of each international bankset of subsidiaries of each international bank Aggregate returns of subsidiaries by regions Aggregate returns of subsidiaries by regions
(industrial vs. emerging)(industrial vs. emerging)
Methodology: 2) Portfolio modelMethodology: 2) Portfolio model
n
iiiErwEr
1
n
i
n
ijijji
n
iii EwwEwE
1 11
2 cov2varvar
Expected return:
Expected variance:
Example:Example:
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0.0 0.1 0.2 0.3 0.4 0.5 0.6
Return
Risk
Efficient Frontier
Home
Alternative Return-Equivalent Allocation
Observed Portfolio
Industrial
Emerging
Deviations of Actual Asset Allocations Deviations of Actual Asset Allocations from the Efficient Frontierfrom the Efficient Frontier
ConclusionsConclusions On average, banks with a larger share of On average, banks with a larger share of
their assets in foreign subsidiaries, their assets in foreign subsidiaries, particularly in emerging economies, have particularly in emerging economies, have been able to obtain larger risk-normalized been able to obtain larger risk-normalized returnsreturns
The regional concentration of international The regional concentration of international expansion is detrimental to diversificationexpansion is detrimental to diversification
Banks exhibit a home-bias in their Banks exhibit a home-bias in their international investment strategies—further international investment strategies—further international expansion beneficial from the international expansion beneficial from the pure risk-return perspectivepure risk-return perspective
Conclusions (Cont.)Conclusions (Cont.) The estimates strongly The estimates strongly
underestimate international underestimate international diversification benefitsdiversification benefits
Caveat: The data do not allow to Caveat: The data do not allow to disentangle cross-border investment disentangle cross-border investment by parent banks, which accounts for by parent banks, which accounts for a large part of international a large part of international exposuresexposures