Hindustan Zinc shares jumped 4% on Wednesday's opening bell to trade at Rs 232 apiece, a day after the firm reported a 6.8% on-year drop in net profit during the July-September quarter. Hindustan Zinc reported a net profit of Rs 1,940 crore as against Rs 2,810 crore in the same period last year, despite a 25% on-year growth in net sales and 39.4% jump in EBITDA. The firm saw a 11% increase in total expenditure from last year and reported higher tax payout. However, Hindustan Zinc's board approved an interim dividend of Rs 21.30 per share with the record date of October 28 which helped push the stock higher.