Indian stock market investors should watch out for key developments today. Tata Consultancy Services faces an adverse $194 million ruling in the US. Rail Vikas Nigam and HG Infra/Kalpataru Projects secure significant orders. Tata Power inks pact for a Bhutan hydro project. Pharma stocks Lupin, Natco, and Shilpa Medicare receive US FDA observations. Adani Wilmar sees a massive promoter stake sale, while other stocks witness bulk and block deals.