Tata Consultancy Services board to consider buyback of equity shares; ADIA to invest Rs 4,966.80 cr in Reliance Retail Ventures; Defence stocks in focus; Bajaj Finserv unlisted insurance subsidiaries' gross direct premium; MCX and MCXCCL to Go-Live with CDP; Coromandel International Ltd. receives notice from GST Authority; Airtel gets penalty from Customs; Biocon receives CRL for Insulin Aspart; Biocon signs partnership with Juno; IDL Explosives bags order from Coal India; Nazara Technologies to allot equity shares; Railway Vikas Nigam receives LOA; Sofcom Systems considers target company for acquisition; Rolta India to explore other options; NCC board approves increase in borrowing powers; Shriram Pistons & Rings acquision delayed; Vedanta incorporates wholly-owned subsidiary; BSE to launch commodity contracts; Olatech Solutions approves bonus issue; KPI Green Energy receives orders; Rishabh Instruments' material subsidiary wins project.