Among the largest underlying components of IWO, in trading today Wex Inc ( NYSE: WXS) is up about 1.5%, Dril-Quip, Inc. ( NYSE: DRQ) is up about 2.3%, and Eagle Materials Inc ( NYSE: EXP) is higher by about 6.2%.
FORBES: IWO, WXS, DRQ, EXP: Large Outflows Detected at ETF