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Oct 8, 2018 at 9:53 comment added Quantuple Dear @Ant, not sure I understand. Usually switching numéraires is a mathematical trick to obtain results in a simpler, less hand wavy, form. That being said, by definition, any numéraire should make the value of any self-financing strategy (when expressed in that numéraire) a martingale. Not sure I was clear either :)
Oct 8, 2018 at 9:35 comment added Ant Dear @Quantuple, I personally liked the paper you offered in the answer I linked to. Could you please suggest how to choose numeraire in general case? In case of Interest Rate products numeraire is usually ZC bond price, but when we have collateral, or some option is a combination of some underlying priced in foreign currency we choose different numeraires.. Is there any hint how do we find which numeraire makes a process in expectation a martingale? Hopefully you understood what I mean :)
Oct 8, 2018 at 9:13 vote accept Ant
Oct 8, 2018 at 7:37 history answered Quantuple CC BY-SA 4.0