SABR smiles for RFR caplets
The SABR model for volatility is adapted to price risk-free rate caplets
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Sander Willems presents a natural extension of the stochastic alpha beta rho (SABR) model to price both backward- and forward-looking risk-free rate (RFR) caplets in a post-Libor world. The author provides closed-form effective SABR parameters for pricing backward-looking RFR caplets. These results are useful for smile interpolation and for analysing backward- and forward-looking smiles in normalised units
Following a speech by the Financial Conduct Authority in July
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