The iShares S&P Global Nuclear Energy Index Fund (Ticker: NUCL) seeks investment results that correspond generally to the performance, before fees and expenses, of the S&P Global Nuclear Energy Index. The index is designed to provide liquid exposure to publicly listed companies in the global nuclear energy business from developed and emerging markets and is comprised of approx. 24 of the largest publicly traded companies in nuclear energy related businesses that meet investability requirements. Component securities are grouped into two sub-sectors: 1) nuclear materials, equipments and services 2) nuclear production. Each sub-sector is capped at 50%. Within the sub-sector companies are market capitalization weighted, subject to a 8% cap. The index is rebalanced quarterly.