The BSE benchmark index Sensex today fell by nearly 90 points in early trade, due to fresh selling by funds in the absence of any positive trigger, amid a mixed trend in Asian markets.The 30-share index, which had gained 165.27 points in the previous session, moved down by 89.64 points to 17,272.10, as capital goods, metal, IT and banking sector stocks led the decline.The wide-based National Stock Exchange Nifty declined by 29.40 points to 5,248.80.In Asian, Hong Kong's Hang Seng index was down by 0.08 per cent, while Japan's Nikkei index gained 0.29 per cent in morning trade.