The letter was in reply to the NSE’s request to the company to explain why it had not disclosed the receipt of the letter.
Total income (consolidated) also slipped to Rs 8,347.50 crore during July-Sept 2019-20, as against Rs 8,713.67 crore.
The stock touched an intra-day low at Rs 140.25, down 4.46 per cent.
Shares of the telecom operator ended up by 2.10 per cent at Rs 3.89 apiece.
Turnover slipped to Rs 1.32 lakh crore from Rs 1.51 lakh crore due to dip in prices.
The bank had reported a net loss of Rs 1,542.54 crore in the same period previous fiscal.
Shares of the private sector lender zoomed 34.94 per cent to Rs 76.65 apiece on the BSE.
IDBI Bank has sold an aggregate 35.40 lakh equity shares constituting 0.72 pc out of 1.5 pc of the paid-up capital of NSE.
Aramco was expected to launch the first part of a two-stage IPO earlier in October.
As part of the agreement, Piramal Enterprises will issue and allot 1,15,894 CCDs at a face value of Rs 1.51 lakh.