Bears continued to hammer indices for a second day post outcome of Bihar elections as investors see possible roadblock to key economic reforms.
"Besides the overhang of the Bihar results, sentiments were downbeat in reaction to weak global markets and lack of buying interest among the participants," said Jayant Manglik, President, Retail Distribution at Religare Securities.
In a Samvat year, this is the third worst return given by Sensex in a decade.
The Sensex resumed lower at 26,094.09 and fell further to 25,709.23 before settling 378.14 points or 1.45 per cent down at 25,743.26, its weakest closing since September 28.
The index fell 469.19 points in the previous four days.
Out of the 30-share Sensex, 23 scrips ended lower.
Major laggards were ONGC (4.90 pc), Dr Reddy's (4.80 pc), RIL (3.96 pc), Lupin (3.92 pc), Coal India (3.76 pc), Vedanta (3.68 pc), BHEL (3.28 pc) and Sun Pharma (3.24 pc).
Bucking the trend, auto shares were in demand on strong performance during the ongoing festive season and robust sale numbers on Dhanteras yesterday.
Prominent gainers were Maruti Suzuki, Hero MotoCorp, Bajaj Auto and M&M that gained in the range of 1.13-1.68 per cent.
There will be a special muhurat trading session on both stock exchanges in the evening tomorrow between 1745 hrs and 1845 hrs on account of Diwali.
Overseas, Asian stocks ended lower on increasing possibility of a US Federal Reserve rate hike in December and the latest signal of China's weakening economy.
Key indices in China, Hong Kong, South Korea and Taiwan fell by 0.18 per cent to 1.44 per cent, while Japan's Nikkei firmed up by 0.15 per cent. Singapore market remained closed.
