The beginning of the amazing events at Krakatoa in 1883 date to May 20 when there were initial rumblings and venting from the volcano, which had been dormant for about 200 years.
A refinery margin is the revenue associated with refining petroleum, expressed as a value per volume (e.g. $/L), net of the cost of the crude oil input. The simplest refining
customer margin. Definition. Safeguards enacted in order to ensure that both parties (buyer and seller) of futures and options contracts fulfill the obligations of the contract. Use customer margin in a sentence. â 1  My lawyer accompanied me to the bank to be sure the bank would honor it's customer margin and indeed follow our contract, just as I must as well. â 2  My hedge fund manager insisted that his bank include a customer margin clause in his options contract because he wanted to make sure his counterparties paid him off.