The Sensex at the Bombay Stock Exchange, which rallied by 269 points in opening trade today and lost ground in the late morning deals, was trading 73 points up in afternoon trade at 17,576 when reports last came in. After gaining nearly 357 points in the previous session, the 30-share index rose by 269 points, or 1.54 per cent, to 17,772 in opening trade today, due to the cash reserve ratio cut by the Reserve Bank of India, RBI on Friday. In a similar fashion, the broad-based National Stock Exchange Nifty index was trading 20 points in the green at 5,353.