0t(j5c81mpa]e[ud07rtppo0_media_dl_1.png ICE Futures US

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(Bloomberg) — A sudden burst of extreme price volatility in the coffee market has caught traders and analysts off-guard and left them bracing for more instability.

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Prices for arabica coffee, the premium variety favored by Starbucks Corp. and other specialty roasters, had cooled this year on hopes of a record Brazilian coffee harvest, even though the beans have been slow to arrive in the US and Europe. Speculators and other technical drivers upended that in just hours.

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Futures on Monday surged the most in 26 years, rocketing 19% and flipping the market from a steep loss for the year to a slight gain. Prices then sharply corrected on Tuesday.

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It’s the latest signal that massive fluctuations might be the new norm for the coffee industry, which has already been roiled in recent years by adverse weather and trade conflicts. A 60-day measure of volatility touched the highest level since 2014, surpassing even the volatility seen in the last two years, when arabica coffee futures set record highs.

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“Coffee has officially entered meme-stock territory,” said Tomas Araujo, a senior trader at StoneX.

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The coffee market has turned more bullish in recent weeks, as heavy rains delay the closely watched harvest in Brazil and the El Niño weather pattern takes effect. Stockpiles in exchange-monitored inventories are still at the lowest levels in over two years. But the magnitude of the price swing still caught players in the physical market off guard, who say they do see higher risks to the supply chain, though not a significant fundamental shift.

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Enter the speculators, who likely accelerated the swing as they quickly covered short positions or fled the market with a more bullish narrative emerging. The market had been “trading on the idea of a surplus,” which is real but will take time to materialize in global stockpiles, said Rodrigo Costa, an experienced coffee trader and founder of commodities advisory firm Blue Route Partners.

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A “huge allocation of assets away from energy markets” and into so-called soft commodities like coffee and cocoa was the initial driver of higher prices on Monday, said Sucafina quantitative trader Ilya Byzov, who added that the widely expected coffee surplus makes the session’s historic surge hard to justify. 

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Hedge funds in the week ending June 30 boosted bullish arabica coffee bets to the highest in seven weeks, and a rise in prices late last week was aided in part by the activity of speculative traders that use trend-following algorithms.

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Meanwhile, the Intercontinental Exchange also raised the margin requirements for coffee futures, making it costlier for traders to stay in the market and potentially prompting more exits. Aggregate open interest — the number of outstanding futures and options contracts — has dropped to the lowest in about two months.