HDFC Bank saw the most action on April 4 and was the biggest Nifty50 gainer, rising 10 percent to Rs 1,656.80 on the announcement of HDFC merger

The 30-share pack Sensex plunged 770.31 points or 1.29 per cent to 58,788.02. Its broader peer Nifty50 tanked 219.80 points or 1.24 per cent to 17,560.20

In a tweet, the Competition Commission of India (CCI) said, "Commission approves proposed acquisition of the Zuarinagar plant of Zuari Agro Chemicals by Paradeep Phosphates."

As per a regulatory filing, the board has approved the sell off 'as a going concern and on a slump sale basis'. PPL plans to fund the acquisition by a mix of equity, debt and internal accruals.

The scrip witnessed a spurt in volume by more than 6.58 times and was trading with volumes of 58,242 shares, compared to its five day average of 7,650 shares.

Total income fell to Rs 1,211.39 crore in the second quarter of this fiscal from Rs 1250.91 crore in the corresponding period of the previous year, according to a regulatory filing.

Expenses remained lower at Rs 1,266.73 crore as against Rs 2,154.90 crore earlier.

The company's net loss stood at Rs 255.17 crore during the January-March period of the 2018-19 fiscal, it said in a regulatory filing.

Moody's downgraded Tata Motors corporate family rating (CFR) and the company's senior unsecured instruments rating .

The rating agency also upgraded rating on short term non-fund based limits and short term unallocated limits to A4 from D.

Key support level for Nifty is placed at 8411.07, followed by 8224.38. If the index continues moving up, key resistance levels to watch out for are 8731.37 and 8864.98.

The board will consider & approve the unaudited financial results for the quarter & half year ended September 30, 2019 at the meeting scheduled on November 8, 2019.