"Were interest rates negative enough for long enough, specialist security firms would emerge that would build vaults to store cash on behalf of big depositors and clear transfers between their customers’ accounts. Firms would seek to make payments quickly and receive them slowly. Tax offices would discourage prompt settlement or overpayment of accounts: one Swiss canton has already stopped discounts for early tax payment and said it wants to receive money as late as possible."Weird!!!
Trecho retirado de "The New Frontier of Negative Interest Rates"