
1) Foreign exchange market
Found on
https://www.crosswordclues.com/clue/petrocurrency

Petrocurrency is a neologism used with three distinct meanings, though often confused: ==Oil producers` trading surpluses== With the large rise in oil prices in the 1970s, there was concern that the world economy might contract if the oil producers extracted money and failed to recycle it back to oil consumers. With a similar rise in prices at th....
Found on
http://en.wikipedia.org/wiki/Petrocurrency
No exact match found.