How do I calculate the dollar impact of basis change for a portfolio of cross currency basis swaps which hedged loans/bonds?
I am thinking it might have something to do with delta and tenors but I am not quite sure of the concept.
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Take the weighted average tenor of your book. Weights being the notional of the non usd leg. That is very roughly your duration, which gives you your risk ! Ps i assume all the trades are on the same currency pair