Lee Hong Liang
Petromedia Pte Ltd
GMT 07:42
11th Jun 2007
IP: x.x.69.134MOPS is Mean of Platts Singapore. The bulk of bunker sales is Singapore is made by 380 cst grade, so the commonly used term is MOPS 380 cst.
The differential between ex-wharf 380 cst bunker fuel prices and MOPS 380 cst is the premiums, which can be in positive or negative values, as what you pointed out as +1, +2, or -1, -2.
The values vary according to market fundamentals of supply and demand. When demand is low and supply is good, premiums will be low or negative. When demand is high and supply is tight, premiums will be high or positive.