Capital outflow by foreign funds and weak global shares only added to concerns.
Investors kept their fingers crossed ahead of the landmark tax reform Goods and Services Tax (GST), which is set for a mid-night launch today.
The 30-share Sensex tumbled 154.23 points, or 0.50 per cent, to 30,703.29. It had gained 23.20 points in the previous session though.
Realty, capital goods, auto, banking, metal and consumer durable stocks dealt a blow, falling by up to 1.55 per cent.
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The July futures and options (F&O) series saw a bumpy start amid a weak equity trend in Asia, tracking losses in the US.
Hong Kong's Hang Seng was down 0.90 per cent, Shanghai Composite 0.26 per cent and Japan's Nikkei 1.09 per cent.
The US Dow Jones Industrial Average ended 0.78 per cent lower yesterday.