The document is a research report submitted by Gargi Rai to Dr. A.P.J. Abdul Kalam Technical University. It discusses portfolio construction and evaluation over three years for three portfolios consisting of public sector companies, private companies, and foreign collaborations. It presents the companies in each portfolio, calculates the holding period returns for each stock in each portfolio over the three years, and evaluates portfolio performance using Sharpe's and Treynor's measures under total and market risk.