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Managing Synthetic CDO Tranches using Base Correlations

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Mapping base correlations:<br />

Mechanics after “equivalent” strike is determined<br />

<br />

Consider a risky bespoke portfolio:<br />

Bespoke portfolio<br />

Index portfolio<br />

b<br />

ρ I<br />

a<br />

b’<br />

a’<br />

a’ b’<br />

ρ ( b)<br />

= ρ ( b')<br />

B<br />

ρ ( a)<br />

= ρ ( a')<br />

B<br />

I<br />

I<br />

25

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