Columbia subject headings:
Harvard subject headings:
Commodity Exchange, Inc.--Statistics--Periodicals.
Metal trade--Prices--United States--Statistics--Periodicals.
Metals--Prices--United States--Statistics--Periodicals.
Options (Finance)--United States--Statistics--Periodicals.
Princeton subject headings:
Commodity Exchange, Inc.--Statistics--Periodicals.
Metal trade--Prices--United States--Statistics--Periodicals.