Marketmen said sprouting of selling at existing levels by operators to book profits mainly led the fall in prices.
Besides, weakness in spot markets due to constant supplies and slackness in demand at higher levels weighed on prices in futures trading, they quoted.
At the National Commodity and Derivatives Exchange, guargum delivery for January plunged by Rs 94, or 1.47 per cent, to Rs 6,309 per quintal, in an open interest of 15,490 lots.
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