Mild selling pressure in realty, media, infra, auto, pharma, private banks and FMCG stocks was largely offset by gains in metal and IT sectors, leading the index to finally end lower by 1.55 points or 0.02 per cent to settle at 8,519.50.
In overseas markets, Asian markets extended their rally amid expectations of further easing from Japan and the resolution of some Brexit concerns.
European stocks edged higher as Brexit worries receded amid US rally overnight.
In sectoral front, Nifty Metal surged by 1.68 per cent, followed by IT (0.65 per cent) and energy (0.16 per cent).
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Realty dropped by 1.64 per cent followed by media (1.14 per cent), auto (0.57 per cent), infra (0.61 per cent), pharma (0.35 per cent), private bank (0.33 per cent) and FMCG (0.29 per cent).
Index gainers included Tata Steel (4.51 per cent), GAIL (3.60 per cent), ONGC (2.74 per cent), BHEL (2.31 per cent), and Coal India (2.21 per cent).
A total of 1,110 stocks declined, 507 advanced, while 61 ruled stable. Total securities that hit their price bands today stood at 115.
Turnover in cash segment jumped to Rs 21,271.65 crore from Rs 19,862.16 crore as on Tuesday.
A total of 14,796.27 lakh shares changed hands in 83,70,473 trades. The market capitalisation of NSE stood at Rs 103,80,000.09 crore.