> The reason they're a problem is that most banks have a large portion of their funding in the form of deposits and passing on negative rates to depositors is v

> The reason they're a problem is that most banks have a large portion of their funding in the form of deposits and passing on negative rates to depositors is very very hard - in my experience only the very largest (billions of dollars) overnight deposits get charged negative rates. It's been quite some time Switzerland have negative rates and the threshold for charging the customer are getting lower and lower, closer to 100k than to 1B (base fees have also increased as a result of negative interest rates, easier to increase the banking fees than charge negative rates :))