The rupee woes against the dollar continued as it fell to 67.01, a two-year low, which along with sustained capital outflows kept investors on the edge.
After resuming lower, the 30-share BSE Sensex continued its slide and hit a low of 25,623.71, before settling down by 248.11 points, or 0.96 per cent, at 25,638.11 -- a level last seen on November 18.
The broader NSE Nifty cracked below yet another crucial 7,800-mark by falling 82.25 points, or 1.05 per cent, to close at 7,781.90. It moved between 7,775.70 and 7,821.40 intra-day.
For the week, the Sensex and the Nifty retreated 490.09 points, or 1.87 per cent, and 160.80 points, or 2.02 per cent, respectively.
Globally, Asia and Europe fell after disappointment over the European Central Bank's stimulus decision.
ECB cut its deposit rate deeper into the negative territory and extended its asset buys by six months. But some felt that the action fell short of the crease.
Out of the 30-share Sensex constituents, 26 ended lower.
NTPC, ITC, ICICI Bank, Tata Motors and RIL too lost ground.
Sun Pharma was a bright spot, which soared 4.02 per cent after one of its subsidiaries received USFDA approval to manufacture and market generic version of Novartis' Gleevec.
Shares of Bharti Airtel, Coal India and Tata Steel too gained.
Sector-wise, the BSE power index bled the most by falling 1.78 per cent, followed by realty, FMCG, auto and banking.
The broader markets saw selling pressure too, with the BSE mid-cap index ending 1.05 per down and the small-cap easing 0.64 per cent.