I currently buy CHF 10k worth of VT on IB every two months instead of 5k every month in order to save on the IB currency exchange fee of around CHF 1.80 (USD 2.00 if I remember correctly) for the exchange of my CHF to USD.
Now I was wondering if there is any advantage, even if small, in saving some money/fees if I chose another option such as:
a) buy every month 5k of VT
b) buy every 3 month (quarter) 15k of VT
So to resume my question in another way: would I earn more by immediately placing my money into VT every month (and not save on the currency exchange fee) or better save on the currency exchange fee and place my money bi-monthly or even quarterly?