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Quantitative Finance · Glosario

¿Qué es Pillar, instantaneous forward rate?

También llamado: pillar · instantaneous forward rate

Definition 1.1 Rates, Credit, XVA and Risk · Capítulo 1 — Curve Construction

A pillar of a curve is a date at which the curve carries a free parameter, here the continuously compounded zero rate z(T)z(T), so that P(T)=e−z(T)TP(T)=e^{-z(T)T}; the curve between pillars is fixed by an interpolation rule. The instantaneous forward rate seen at tt for time TT is

f(t,T)=−∂∂Tln⁡P(t,T),P(t,T)=exp⁡(−∫tTf(t,u) du),f(t,T) = -\frac{\partial}{\partial T}\ln P(t,T), \qquad P(t,T)=\exp\Bigl(-\int_t^T f(t,u)\,du\Bigr),

the rate at which one can lock in, at tt, borrowing over [T,T+dT][T, T+dT].

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