The scrip of IDFC tumbled 5.68 per cent to close at Rs 56.50 on BSE. During the day, it lost 6 per cent to Rs 56.25.
Shares of IDFC Bank, however, rose by 0.69 per cent to Rs 65.20 after earlier falling 3.32 per cent to Rs 62.60.
The scrip of Shriram City Union Finance tanked 5.56 per cent to close at Rs 2,349.20. Intra-day, it declined by 7 per cent to Rs 2,312.80.
IDFC, which entered into banking late 2015, and the Piramal Group-backed financial services major Shriram Group on Saturday agreed to merge.
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"The boards of Shriram Group and IDFC have entered into an exclusivity arrangement for 90 days to jointly explore an opportunity for a merger. No transaction has been approved by the boards.
"Now, diligence will take place, we will discuss on the valuations and the respective boards will then meet and then a proposal will be made. If more time is needed then will extend the exclusivity period by another 60 or even 90 days," Ajay Piramal said.
IDFC owns 52.86 per cent in IDFC Bank, which is the seventh-largest private lender in the country now. Piramal owns 20 per cent in Shriram Capital and 10 per cent each in both Shriram Transport and Shriram City Union.
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