Indian stock markets experienced a downturn, but several companies are set to capture investor attention. Key updates include Infosys's Rs 18,000 crore share buyback starting November 20, Tata Consultancy Services securing a five-year deal with NHS Supply Chain, Hindustan Unilever setting a record date for its Kwality Wall's spin-off, Adani Energy Solutions winning a major transmission project, and new agreements for Azad Engineering and GR Infraprojects, alongside product launches from Escorts Kubota and consultancy support for RITES.