After reporting record profits, state-owned fuel retailers Indian Oil Corporation (IOC), BPCL and HPCL posted up to 90 per cent slump in their June quarter earnings as margins fell and they booked under-recovery on the sale of domestic cooking gas LPG at government-controlled rates. IOC, the nation's largest oil firm, reported 81 per cent drop in standalone net profit in April-June - the first quarter of current 2024-25 fiscal year - to Rs 2,643.18 crore as opposed to a profit of Rs 13,750.44 crore a year back, according to a company filing. Net profit also declined sequentially, when compared to an earning of Rs 11,570.82 crore in March quarter. Hindustan Petroleum Corporation Ltd (HPCL) posted 90 per cent drop in profit to Rs 633.94 crore as compared to an earning of Rs 6,765.50 crore in April-June 2023 and Rs 2,709.31 crore in the preceding March quarter. Bharat Petroleum Corporation Ltd (BPCL) net profit dropped to Rs 2,841.55 crore in April-June from Rs 10,644.30 crore a year .