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Managing Synthetic CDO Tranches using Base Correlations

Managing Synthetic CDO Tranches using Base Correlations

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Mapping base correlations between bespoke and<br />

index portfolios<br />

<br />

Given a base correlation surface ρ Ι<br />

(X,T), can we determine ρ Β<br />

(X,T)<br />

Idea is to find an equivalent base tranche on a standard index with strike X I<br />

X<br />

a<br />

B<br />

X I<br />

<br />

This mapping gives the bespoke base correlations:<br />

24

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