EWK covers the all cap space of the Belgium market. No ETF can fully replicate the Belgian market due to RIC diversification rules. The colossal Anheuser-Busch InBev represents over half of the Belgian market, but RIC rules force funds to cap exposure to a single constituent at 25%. Therefore, EWK is forced to underweight Anheuser-Busch InBev to about a quarter of the total portfolio, and each sector outside consumer cyclicals is consistently over-weighted by a few percentage points. Specifically the constraints includes that the sum of the weights of all issuers representing more than 5% of the index should not exceed 50%. The index is rebalanced quarterly.