Benchmark domestic equity indices, the Sensex and the Nifty, were trading over half a per cent down during the forenoon trade today. Earlier, both indices opened in the negative zone amid weak global cues. The Sensex slipped 504 points to 84 thousand 708, while the Nifty dipped 146 points to 25 thousand 881, when reports last came in. On the sectoral front, Metal, Realty and IT were dragging the most, while Telecommunication, FMCG and Consumer Durables were gaining.