1 Introduction 2 Roll Adjusted Prices 3 The Role of Roll Yield 4 Sugar Spread Volatility vs Roll Yield 5 Remarks 1 Introduction The raw-refined sugar spread, SB vs QW, is one of our bread and butter processing margin trades. Raw sugar in the form of sugar cane or beets have to be refined to get the normal white sugar we are all used to. In the Sugar Trading Manual - Cost of production the author adds a fixed cost of USD 65/t which equates to their estimate of the world average cost of upgrading raw sugar to refined sugar in autonomous refinerries.