Remind me again why a stock exchange needs to have a location and why the traders need to be near that location. Everything is done by computers over networks now.
Sure the servers need to be somewhere, a corporate office needs to be somewhere, but the servers and corporate office don’t need to be in the same place, the servers don’t (and probably shouldn’t) all be in the same place, and the traders don’t need to be near either.
I think that if you move the physical location of the stock exchange, then you move the people that de Blasio wants to tax. Let him tax the theaters.