Indian market closes higher for fourth consecutive day as S&P BSE Sensex rises over 800 points and Nifty50 closes just below 21,900 levels. Buying seen in IT, realty, oil & gas, and public sector, while selling seen in healthcare, utilities, and auto stocks. Stocks in focus include IRFC, Macrotech Developers, and Firstsource Solutions, which hit fresh highs and saw volume or price breakouts.