The company's net profit was at Rs 130 crore in the corresponding quarter last fiscal.
Total income of the company declined Rs 144.27 crore for the reported quarter from Rs 156.27 crore in the same period a year earlier, the company said in a regulatory filing.
"Based on the recent developments in Tata Teleservices Ltd (TTSL), the company has written-off the residual value of its investment in TTSL amounting to Rs 6.66 crore for the quarter ended September 30, 2017," it said.
The merger agreed on a debt-free, cash-free basis as well as all the past liabilities and dues to be settled by the Tata group will result into over 4 crore customers of TTSL and Tata Teleservices Maharashtra (TTML) joining Bharti Airtel.
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Tata Investment invests in a diversified portfolio of quoted and unquoted securities of companies, including Tata companies.
Shares of the company closed 2.67 per cent down at Rs 870.60 apiece on BSE today.
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