I was in the process to open an IB account and I noticed that IB now warns you about the negatives interest rates of CHF.
As stated in Interest Rates | Interactive Brokers LLC it seems that there is not size account limitation.
" For balances held in CHF, DKK, EUR, JPY or SEK, IBKR currently applies an effective negative rate to long balances held. The negative rate applied to accounts holding these currencies is the same regardless of account size. For other currencies in which the benchmark rate plus the interest rate paid is less than zero, the interest paid is 0%."
Can you help me to understand better?