Van Eck have been selling since around late Feb, it does not happen in one day as the volume of stock to change is too significant to sell in one day. In the case of BDR, i believe it's around 16 days of volume.
For example, they would run this through a selling algorithm and say 'sell 15% of average daily volume'. This would put a constant selling pressure on the shares in order to reach the required new index weight. If there were redemptions then they may be more aggressive on a certain day (noticed this last week).
Once the rebalance is out, then other ETF's will re-balance. However, after reviewing the top 20 share holdings of these companies they are not significant (generally around 2% of issued capital). Yes, post the date there might be more volatility. But the stocks will revert back to true value, although when exactly is impossible to say.
BDR Price at posting:
21.5¢ Sentiment: Buy Disclosure: Held
