Mumbai, Sep 14 - A key index of the Indian equities markets snapped its six-day rally Monday amid global pressure and profit booking in some stocks and closed 50 points down from its previous close.

The 30-scrip sensitive index (Sensex) of the Bombay Stock Exchange (BSE), which opened lower at 16,185.26 points, closed at 16,214.19 points, down 50.11 points or 0.31 percent.

Similarly, the Nifty of the National Stock Exchange (NSE) also ended in the negative terrain at 4,808.6 points, down 0.43 percent.

Broader market indices, however, made small gains, with the BSE midcap index ending 0.15 percent higher and the BSE smallcap index up 0.46 percent.

The market breadth was positive, with 1,472 stocks advancing, 1,310 declining and 73 remaining unchanged.

Among the gainers were Tata Steel, up 2.12 percent; Tata Motors, up 1.97 percent; SBI, up 1.95 percent; Hindustan Unilever, up 1.62 percent; and Mahindra and Mahindra, up 1.44 percent.

Among the losers were Sterlite Industries, down 3.55 percent; Hindalco, down 2.46 percent; Grasim, down 2.01 percent; Reliance Communications, down 1.