Todos los libros

Profesional

Apps Acerca de Coach Iniciar sesión Empezar a leer

Quantitative Finance · Glosario

¿Qué es Scenario conditioning?

Definition 22.5 Rates, Credit, XVA and Risk · Capítulo 22 — Stress Testing and Scenarios

Scenario conditioning fills the factors a scenario does not specify with their expectation given the specified ones. Under a joint normal model with covariance Σ\Sigma, shocks xsx_s to the specified factors give E[xu∣xs]=ΣusΣss−1xs\E[x_u\mid x_s] = \Sigma_{us}\Sigma_{ss}^{-1}x_s for the others.

Ejemplos

Example 22.6 (A ten-year shock)

Shock the ten-year yield up 100 basis points. Alone, it costs the book USD 14.80 million. Filled in with the ten-day covariance of daily moves since 2020, the scenario also moves the two-year up 80 basis points, the euro down 0.36% and USDJPY up 2.25%; the loss is USD 10.04 million, because the two-year short gains. The scenario sits 5.3 standard deviations from the centre of the ten-day distribution.

Leer en el capítulo →