What criteria are being used to determine "immediate rebalancing"? Since the index fund doesn't trade yet, it is ok to do this kinds of actions, but rebalancing without warning is a strict no-no once the actual index launches. Otherwise people will quickly lose trust in the index. I hope the ICONOMI team realizes this. The market should always get a heads up on when and how rebalancing takes place. Look up how stocks get added to S&P500 as a reference.

Rebalancing

Index rebalancing is performed at each end of month or more regularly if ICONOMI deems it necessary. Between rebalancing periods, index constituents’ weights move proportionally to their price movements. If the weight of a specific currency surpasses 20%, the index is rebalanced immediately. ICONOMI appoints a committee that determines the composition of the index at each rebalancing. The committee members propose the addition of new members to the index as well as their weightings and the potential removal of certain members. The final decision is taken with a vote. Additions and deletions of new or old members to the index will be explained to the public as they occur.