Mumbai, July 29 - Profit booking and a crash at the Chinese bourses pulled down a key index of Indian equities markets 203 points and into the red Wednesday.

The 30-scrip benchmark index of the Bombay Stock Exchange (BSE), the Sensex, which opened lower at 15,293.19 points, shut shop at 15,128.06 points -- 203.88 points or 1.33 percent lower than Tuesday's closing figure.

Similarly, the S&P CNX Nifty of the National Stock Exchange (NSE) closed in negative terrain, 1.4 percent down at 4,500.2 points.

Broader market indices were also down, with the BSE midcap index ending 1.12 percent lower and the BSE smallcap index moving down 1.5 percent.