The benchmark BSE Sensex tumbled over 59 points in early trade on Friday as participants took to profit-booking after five sessions of gains and ahead of IIP data to be released later in the day. The 30-share index was trading lower by 59 points at 28,826 as healthcare, banking, capital goods, metal and auto sector indices were trading in negative territory, with losses up to 0.42 per cent. The gauge had advanced 928 points in the previous five sessions. Similarly, the Nifty declined by 15 points at 8,768.