Burzovní data
| Chicago Board of Trade | http://www.cbot.com |
| Chicago Board Options Exchange | http://www.cboe.com |
| Chicago Mercantile Exchange | http://www.cme.com |
| Commodity Futures Trading Commission | http://www.cftc.gov |
| Commitment of Traders | http://www.commitmentoftraders.com |
| Commodity Research Bureau | http://www.crbtrader.com |
| End-of-Day Data (free downloads) | http://www.eoddata.com |
| OPEC | http://www.opec.org |
| World Gold Council | http://www.gold.org |
