As of March 31 of this year, there were 5,362 Federally-insured commercial banks and savings associations in the United States. Just two of these banks, JPMorgan Chase NA and Citibank NA control 75.7 percent of all precious metals derivatives contracts held by all of the 5,362 Federally-insured banks and savings associations. This finding comes from a report released last week by the regulator of national banks, the Office of the Comptroller of the Currency (OCC). (See Table 9 in the Appendix of the OCC report.)

http://wallstreetonparade.com/2019/06/occ-report-jpmorgan-chase-and-citibank-control-76-percent-of-all-precious-metals-contracts-at-5362-federally-insured-banks/