|By Matein Khalid| I had called for Brent crude to fall to $30 in successive columns since the November 2014 OPEC conclave in Vienna, when Saudi Arabia abandoned its traditional role as the “swing producer” the central bank of black gold. The world oil markets now face a supply shock, a demand shock, epic volatility and the loss of the “swing producer”. The world is running out of storage capacity, in Rotterdam, Antwerp, Galveston Texas, Kharg Island in Aberdeen. In 1999, this led to $10 Brent. The petro-currencies I track now price this macro scenario. Note the Canadian dollar has now fallen to 1.45 and some of my closest friends in Dubai/Abu Dhabi are in the market for an office tower in Toronto or Montreal. Brent and West Texas both traded at $29 on Friday. A century ago, John D. Rockefeller called the free fall in oil prices “the great sweating”.