IWC takes a plain vanilla, market-cap-weighted view of the micro-cap segment. The underlying index selects 1000 of the smallest from the Russell 2000 Index. From our perspective, however, it skews large, putting a lot of weight in companies we consider small-caps. Its beta indicates that the fund is relatively volatile compared with the broad US micro-cap market. Still, it provides decent coverage of the space overall. Holdings costs are likely to be lower than the stated expense ratio, thanks to smart portfolio management that tends to recover a sizeable chunk. A solid choice for this hard to reach area of the market.