The company's stock tanked 15.51 per cent to settle at Rs 14 on the BSE. In intra-day trade, the scrip slumped 17.32 per cent to Rs 13.70.
At the NSE, Jaiprakash Power's stock tumbled 15.41 per cent to close at Rs 14.
TAQA said yesterday through a consortium it will acquire Jaiprakash Power Ventures' two hydro-electric power plant, Baspa Stage II and Karcham Wangtoo, having 1,391 MW capacity.
"The consortium will also acquire the assets' non-recourse project debt," said TAQA, which is the brand name of Abu Dhabi National Energy Company.
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TAQA holds 51 per cent stake in the consortium and will have control of operations and management of both the plants under the proposed deal, it said.
The acquisition is expected to close in 2014 and is subject to regulatory and third party approvals, TAQA said.