The rally in sugar has joined the rare few to send prices above 30 cents a pound, as macro-economic concerns added to concerns for the sweetener's supplies to lure in fresh buyers. Raw sugar for December delivery rose 2.5% to touch 30.19 cents a pound on Tuesday, the highest for a benchmark contract for 10 months. It also made the current rally only the fourth in history to take prices above 30 cents a pound, along with jumps in 1974 and 1980, as well as the rally which ran from late 2008 until early February this year. The latest uptick followed a London sugar week which showed "clearly a consensus built up within the industry that the market was generally bullish", Thomas Kujawa at Sucden Financial said.

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