Of course it was maintainable.
They stopped doing it because the situation in the EZ more or less stabilized.
The Swiss central bank can always sell as many Francs as they want at any price that is below current bids and that’s always the case when defending an upside limit. They’re never going to run out of Francs to sell because they can issue without any technical limit.
The Swiss central bank can always sell as many Francs as they want at any price that is below current bids and that’s always the case when defending an upside limit. They’re never going to run out of Francs to sell because they can issue without any technical limit.