DLF will replace Dr Reddy's Labs in the Bombay Stock Exchange (BSE) 30-stock index, Sensex, on November 19, an official spokesperson of the exchange said. DLF, which was listed on July 5, has appreciated nearly 50% since listing. The stock was quoting at Rs 819 per share, down 3.84% around 1120 hrs, in a weak market today.The move comes close on the heels of realty player Unitech's inclusion in the Nifty-50 in place of IPCL since October 4.