You can adjust your investment strategy at any time in the VIAC App. The effective implementation takes place on the next weekly trading day on the following Tuesday. There are no additional costs in the sense of primary trading costs (brokerage fees). However, each exchange transaction also incurs external ancillary trading costs. These may be spreads (difference between buying and selling price) for index funds/ETF and currencies, or taxes (e.g. stamp duties). We try to keep these external ancillary trading costs as low as possible through intelligent internal netting (see Academy).