Guess I should have elaborated further on my thoughts.I would say -90percent within 2 days.
first day -30percent as a gap move and that will spur margin calls up the wazoo and continued forced selling.
It would be so catastrophic the government (if it still exists) would have to backstop all investors and markets would rally back to -20percent on that.
Markets wouldn't exist because we wouldn't. IM(limited knowledge)O there is no such thing as a limited nuclear war .... anymore.
When U.S. dropped the hydrogen bombs on Nagasaki and Hiroshima in 1945 we were the only ones who had them, at the time. That obviously is no longer the case.
If anyone uses them presently or in the future, all will likely use them. "Everyone gets a piece" we used to say, although in reference to something completely different.