I myself have thought many things, but if I were to choose one, it would be the importance of ensuring that people retain confidence and trust that financial infrastructure will function normally. In the week following the earthquake, rumors spread mainly among some foreign financial institutions that Tokyo financial markets would close.
It follows that the provisional Brexit plans that are currently being formulated may have to be revised over time, if the course of these negotiations take unexpected twists. The value of optionality is high in the current environment: as the negotiations unfold, some options will lose value, while others will gain.