The Fed injects reserves into the system every time one of its member banks makes a loan. Those dollars also have to be repaid with dollars created by Congress deficit spending, so they are also temporary loans and obligations, not assets, to banks. The only reason for the Fed to do anything it doesn’t do every day in the normal course of managing our money supply is to absorb risky securities held by its member banks, usually as collateral for leveraged investments that are at risk. We’ll see more QE type investments until we elect politicians that understand finance at the federal level and prevent Wall St from running with scissors and calling it GDP.