The BSE benchmark index Sensex was trading 93 points in negitive territory at 16,556 a short while ago. Snapping a four-day rising streak, the Sensex fell by 95 points to 16,553 in early trade today. The downfall comes after funds and retail investors booked profits at prevailing levels amid a weak trend in other Asian markets. The 30-share index, had gained over 684 points in the past four sessions.In a similar fashion, the wide-based National Stock Exchange index Nifty declined by 31 points to 5,018.