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A measure of the degree of linear association between a pair of random variables.

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Why is credit exposure higher for a smaller probability of default than for a larger default?

From John Gregory: We can see that with 50% correlation, wrong-way risk approximately doubles the EE whilst with 50% correlation the impact of right-way risk reduces it by at least half. … Negative correlation causes right-way risk. Let us look into this simple model in a bit more detail. …
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