AAU almaden minerals, ltd. common shares AMEX Precious Metals ADES advanced emissions solutions, inc. NASDAQ Major Chemicals AEM agnico eagle mines limited NYSE Precious Metals AES the aes corporation NYSE Electric Utilities: Central AG first majestic silver corp. ordinary shares (canada) NYSE Precious Metals AGI alamos gold inc. class a common shares NYSE Precious Metals AGX argan, inc. AMEX Engineering & Construction AIN albany international corporation NYSE Textiles ALB albemarle corporation NYSE Major Chemicals AMRC ameresco, inc. class a NYSE Engineering & Construction AMRK a-mark precious metals, inc. NASDAQ Other Specialty Stores AMTX aemetis, inc NASDAQ Major Chemicals AMWD american woodmark corporation NASDAQ Forest Products APD air products and chemicals, inc. NYSE Major Chemicals APWC asia pacific wire - common shares, par value .01 per share NASDAQ Telecommunications Equipment AQMS aqua metals, inc. NASDAQ Metal Fabrications ASIX advansix inc. NYSE Major Chemicals ASM avino silver & gold mines ltd. common shares (canada) AMEX Precious Metals ATI ati inc. NYSE Steel/Iron Ore AU anglogold ashanti plc ordinary shares NYSE Precious Metals AUMN golden minerals company AMEX Precious Metals AVD american vanguard corporation ($0.10 par value) NYSE Agricultural Chemicals AXTA axalta coating systems ltd. common shares NYSE Paints/Coatings BAK braskem sa adr NYSE Major Chemicals BBU brookfield business partners l.p. limited partnership units NYSE Engineering & Construction BCPC balchem corporation NASDAQ Major Chemicals BDC belden inc NYSE Telecommunications Equipment BGC bgc group, inc. - class a NYSE Telecommunications Equipment BHP bhp group limited american depositary shares (each representing two ordinary shares) NYSE Precious Metals BLD topbuild corp. AMEX Engineering & Construction BTG b2gold corp common shares (canada) AMEX Precious Metals BVN buenaventura mining company inc. NYSE Precious Metals CBT cabot corporation NYSE Major Chemicals CC chemours company (the) NYSE Major Chemicals CCJ cameco corporation NYSE Precious Metals CDE coeur mining, inc. NYSE Precious Metals CDXS codexis, inc. NASDAQ Major Chemicals CE celanese corporation celanese corporation NYSE Major Chemicals CENX century aluminum company NASDAQ Aluminum CF cf industries holdings, inc. NYSE Agricultural Chemicals CGA china green agriculture, inc. NYSE Agricultural Chemicals CHD church & dwight company, inc. NYSE Package Goods/Cosmetics CHNR china natural resources, inc. - common shares NASDAQ Precious Metals CLF cleveland-cliffs inc. NYSE Precious Metals CLH clean harbors, inc. NYSE Environmental Services CLW clearwater paper corporation NYSE Paper CMC commercial metals company NYSE Steel/Iron Ore CMCL caledonia mining corporation plc common shares AMEX Precious Metals CMP compass minerals intl inc NYSE Mining & Quarrying of Nonmetallic Minerals (No Fuels) CRS carpenter technology corporation NYSE Steel/Iron Ore