At the National Commodity and Derivative Exchange, guar gum to be delivered in November month slumped by Rs 109 or 1.30 per cent to Rs 8,283 per quintal, with an open interest of 13,455 lots.
Also, the delivery for most-active October month dropped by Rs 99 or 1.20 per cent to Rs 8,173 per quintal, in an open interest of 42,090 lots.