My last post was about whether money was a liability of the issuer.
Lee Kelly, in a comment, summed up my thoughts:
"Base money isn't really a liability of the central bank, but good monetary policy usually involves pretending that it is, e.g. by instituting a nominal GDP or inflation target."
The Bank of Canada targets 2% CPI inflation. In what sense does that promise to keep inflation at the 2% target create a liability for the Bank of Canada? How big is that liability?
My answer: by targeting inflation the Bank of Canada has written an American put option on base money. That put option has a strike price that declines at 2% per year measured against the CPI basket, and has an indefinite expiry date. Base money is not a liability of the Bank of Canada. The put option is a liability of the Bank of Canada. The value of that put option, and the liability of the Bank of Canada, is always less than the value of the monetary base.
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