Notes on Convexity and Quanto Adjustments for Interest Rates and Related Options
We collect simple and pragmatic exact formulae for the convexity adjustment of irregular interest rate cash flows as Libor-in-arrears or payments of a swap rate (CMS rate) at an irregular date. The results are compared with the results of an approximative approach available in the popular literature. For options on Libor-in-arrears or CMS rates like caps or binaries we derive an additional new convexity adjustment for the volatility to be used in a standard Black & Scholes model. Download the Notes here.
Key words: interest rate options, convexity, quanto adjustment, change of numeraire