India's National Stock Exchange steps into the public arena today, completing a ₹22,562 crore IPO that transforms the very institution through which most of the country's equity trades flow into a publicly accountable entity — a moment that holds a mirror to the maturity of India's financial markets. As the exchange submits itself to the same forces of disclosure and market judgment it has long administered for others, broader indices are expected to open lower, while crude oil prices quietly reshape the fortunes of insurers, refiners, paint makers, and airlines alike. Across sectors, the day'