First banks will get margin-called, what will imply bail-ins (money from depositors will be used to save the banks), people will start a run on the banks, which will call for the FED, PBC and ECB to close the banks, stock-markets will plunge and trading will be halted by the SEC...
Cash and metals will become king, cryptocurrencies will rise like never before...
Pandemonium, like I said! ;-)