Where did the 150T number come from?
A couple places - The Dallas Fed president put it at $100T in 2008 before the crash and Fed “twist” (use Ixquick, not Google, to search “Storms on the horizon” - by Richard Fisher). There was another financial article in the last 2 years that added up all of the Fed and unfunded state debt that will go onto the Fed balance sheet that put it at $150T.