For the week, the first of the new Samvat Year 2073, the Sensex and Nifty both recorded losses by plunging 667.36 points, or 2.38 per cent, and 204.25 points, or 0.36 per cent, respectively.
The relentless losses in stocks continued amid sustained selling by foreign funds and retail investors, tracking global cues dominated by fear that market favourite Hillary Clinton is lagging behind Donald Trump in the US presidential race.
Moreover, domestic market woes piled up as the session saw pharma stocks tumbling following reports of a likely US probe against Indian pharma companies making generic drugs.
Reacting to the news, Sunpharma shares tumbled 7.45 per cent, followed by Dr Reddy 5.67 per cent, Lupin 3.57 per cent and Cipla 2.60 per cent.
Vinod Nair, Head of Research, Geojit BNP Paribas Financial Services Ltd, said, "Market tumbled as investors are concerned over the final lap of US political battle and higher tax burden from GST. Even though GST is one step closer, white goods were impacted on fears of a higher tax burden than expected earlier. Pharma companies are the major casualty due to the price collusion in US market. The rising volatility led the investors to wait and watch for a favorable risk reward."
The NSE Nifty shed 51.20 points, or 0.60 per cent, to end at 8,433.75, after moving between 8,504 and 8,400.25.
The broader markets too remained under pressure as investors indulged in cutting down their bets with the small-cap index falling by 2.20 per cent and the mid-cap index shedding 1.34 per cent.
Bucking the overall trend, shares of consumer goods companies turned buyers' fancy on hopes that lower tax rates would be applied after a four-tier GST tax structure of 5, 12, 18 and 28 per cent decided by a high-powered council yesterday.
Globally, in the Asian region, Japan's Nikkei fell 1.34 per cent, Shanghai Composite fell 0.12 per cent, while Hong Kong's Hang Seng down 0.18 per cent.
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Moving to the domestic market, 18 scrips ended lower while 12 others closed higher.
Besides pharma majors, other major laggards were Coal India 3.44 per cent, Hero Motocorp 2.86 per cent, RIL 1.92 per cent, L&T 1.78 per cent, Maruti 1.58 per cent, HDFC 1.41 per cent and SBI 1.14 per cent.
While, shares of cigarette major ITC jumped 3.64 per cent to Rs 249.05 after fears of GST overhang subsided after the finalisation of a four-tier tax structure. Earlier, there were uncertainties about charging higher tax on tobacco post GST.
Among the sectoral indices, healthcare dropped 4.16 per cent, realty 2.44 per cent, metal 2.41 per cent, telecom 2.08 per cent, capital goods 1.72 per cent, consumer durables 1.60 per cent and energy 1.35 per cent.
However, FMCG rose by 1.41 per cent and IT 0.66 per cent.
The market breadth remained negative as 2,224 stocks ended in red, 681 closed in red while 115 ruled steady.
Total turnover on BSE amounted to Rs 4,542.79 crore, higher than turnover of Rs 3,202.47 crore registered during the previous trading session.
