NiSource Inc. is publicly traded under the stock symbol "NI." It is listed on the New York Stock Exchange, which is one of the largest and most prestigious stock exchanges in the world. As a company that provides natural gas and electricity to customers across various states, its performance on the stock market can reflect overall trends in the energy sector. Investors often track such symbols to stay informed about the company's market position and financial health. For the most current information regarding NiSource Inc.'s stock performance and other financial data, it may be beneficial to visit financial websites or check news updates specifically related to the stock market.