Central bank digital currency: the end of monetary policy as we know it?
I argue that taken to its most extreme conclusion, CBcoin issuance could have far-reaching consequences for commercial and central banking – divorcing payments from private bank deposits and even putting an end to banks’ ability to create money. By redefining the architecture of payment systems, CBcoin could thus challenge fractional reserve banking and reshape the conduct of monetary policy.
.. Because banknotes and coins circulate in the economy, they are also referred to as ‘currency’. Yet currency is only a very small part of money (see McLeay et al (2014)). Money mostly consists of electronic deposits: broad money consists of (currency and) households’ and firms’ deposits with commercial banks, while base or CB money consists of (currency and) commercial banks’ deposits with the CB (‘CB reserves’).
.. Another scenario would see a large-scale shift of customer deposits into CBcoin, forcing banks to sell off their loan books. Bank deposits could still exist but as saving instruments, no longer used to make payments. Banks could still originate loans, provided they lent money actually invested by customers, say, in non-insured investment accounts that couldn’t be used as a medium of exchange. Banks would operate like mutual funds, losing their power to create money and becoming pure intermediaries of loanable funds, as described in economic textbooks.
.. Under this scenario, the contraction of broad money (bank deposits), and the attendant emergence of ‘private-sector base money’ made of CBcoin would mark the demise of fractional reserve banking (see Sams (2015)). The conversion of bank deposits into CBcoin deposits at the CB would amount to 100% reserve backing for deposits. This could usher in a system similar to the Chicago Plan, a set of monetary reforms proposed by Irving Fisher during the Great Depression and recently revisited by Benes and Kumhof (2012).
The Plan’s call for the separation of the credit and money-creating functions of private banks would be addressed – with 100% reserve backing, banks could no longer create their own funding – deposits – by lending.