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Quantitative Finance · Glossário

O que é Wrong-way risk?

Definition 17.11 Rates, Credit, XVA and Risk · Capítulo 17 — Counterparty Exposure

Wrong-way risk is a positive dependence between a counterparty’s probability of default and the bank’s exposure to it: the exposure is largest when default is likeliest. It is specific when the dependence is built into the trade (protection bought from a counterparty on itself or on its own country) and general when it comes through common market factors.

Expected exposure of the cross-currency swap, unconditionally and conditional on the counterparty defaulting at each date, when the counterparty’s hazard rises as the euro falls. The exposures that matter are those in the scenarios where the counterparty defaults. Data: the chapter’s tutorial.
Figure 17.5. Expected exposure of the cross-currency swap, unconditionally and conditional on the counterparty defaulting at each date, when the counterparty’s hazard rises as the euro falls. The exposures that matter are those in the scenarios where the counterparty defaults. Data: the chapter’s tutorial.

Exemplos

Example 17.12 (A counterparty that weakens with the euro)

Let the counterparty of the cross-currency swap have a hazard rate of 2%×(Xt/FX(0,t))−52\%\times(X_t/F_X(0,t))^{-5}: a 10% fall of the euro below its forward raises its hazard by about 70%. The bank’s exposure is largest when the euro has fallen. Weighting the paths by the probability of default in each period, the expected exposure conditional on default is 2.52 times the unconditional EE at its peak, and 2.22 times on average over the life (Figure 17.5).

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