The Sensex resumed lower at 26,107.98 and hovered in a range of 26,339.10 and 25,386.48 before ending the week at 25,863.50, a loss of 355.41 points, or 1.36 per cent.
The Sensex had gained by 1,017.01 points, or 4.04 per cent, in the previous two weeks.
The 50-share Nifty also dropped 113.40 points, or 1.42 per cent, to close at 7,868.50. It had gained 326.85 points, or 4.27 per cent, in the previous two weeks.
European stocks tumbled as US index futures took a sharp knock after the scandal surrounding emission standards involving German car major Volkswagen deepened.
More From This Section
Traders said sentiment was also under pressure after the Asian Development Bank said weaker growth in China this year is expected to cause a slowdown in the rest of Asia.
Stocks in the metal space suffered the most after the entire base metal pack retreated at the London Metal Exchange (LME) on mounting global stock amid renewed concerns over slowing growth in China, the biggest consumer of metals.