An interesting move by the ECB would be to offer short to medium term notes in the market place.
As discussed over the years, unlike other currencies, the euro has no ‘risk free deposits’ available to anyone other than member banks and foreign governments.
This has probably caused substantial numbers of investors to sell their euro for other currencies rather than hold any of the available euro denominated financial assets.
If so, ECB notes could mark the return of these portfolio to ‘normal’ allocations to euro denominated financial assets, which would offer strong support for the euro vs other currencies.
And with the ECB measuring success by the strength of the euro, this could be an attractive proposition.
It would attract euro deposits from the banking system, which the ECB can easily accommodate by continuing its current policy of liquidity provision for its member banks as needed.
Additionally, and not that it actually matters for inflation, lending, aggregate demand, etc., most monetarists would not include these notes as part of the ‘money supply’ but instead as an anti inflationary ‘sterilization’ measure.