S&P 500 index extended loss on Thursday after data showed US labour market added more jobless claims and GDP for the first quarter was revised down. US benchmark slipped 0.23% or 2.99 points and closed at 1,310.33. S&P 500 has given up 6.3% for the month. Kohl Corp fell 6.2% after retailer reported its same store sales declined by 4.2% in May. In contrast, another retailer, TJX Companies, gained 2.7% after posting a 8% surge in same store sales for May.