"Bharti's credit profile will improve slightly as it's paying no consideration for the operations, which it would acquire free of debt...benefits from additional spectrum, fibre assets and subscribers will more than offset the additional spectrum liabilities," said the report by Fitch.
The rating agency said Bharti's revenue market share will increase by 4-5 percentage points to 37-38 per cent post- deal.
The Tatas and Airtel yesterday inked a plan wherein consumer businesses of the diversified conglomerate will be acquired by the largest telco on a 'no cash, no debt basis'.
Fitch said the deal will help arrest the decline in Bharti's pretax profit and bolster its 4G spectrum portfolio and network position.
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For Tata Telecom, it will be about exiting the consumer mobile segment, avoiding future investment requirements and potential further losses,it said, adding the headroom for Bharti's 'BBB-' rating improves slightly if the deal concludes in 2018, as leverage levels come down.
It said Bharti's earnings will decline by at least 5 per cent in FY18 due to intense price competition and lower mobile termination rates but the same will improve in FY19 with a growth of 3-5 per cent.
"Bharti will take over only a small part of Tata Tele's deferred spectrum liabilities of USD 1.5 billion. We do not expect the transaction to result in any other increase in debt at Bharti," it said.
The deal, which is subject to approvals from the telecom regulator, courts and anti-trust authorities, could be completed in the next 12 months, the agency said.
"We expect that Jio tariffs will have to rise in the medium term if it is to earn an acceptable return on its significant investment," Fitch said.