The Sprott Zacks Junior Gold Miners Index is comprised of junior gold and junior silver mining companies that trade on major U.S. or Canadian exchanges. Junior companies include early stage mining companies that are in the exploration phase only or hold properties that might not ultimately produce gold or silver. Each constituent must derive a majority of its revenues from gold and/or silver mining activities. While ensuring that the selected constituents are investible, Zacks uses its proprietary, rules-driven model that seeks to outperform a purely passive representation of the smaller market capitalized companies in the gold and silver mining industry. The Index is modified market capitalization weighted and reconstituted twice a year.