The Bombay Stock Exchange benchmark Sensex on Friday fell by over 132 points in opening trade on fresh capital outflows by foreign funds. The 30-share Sensex, which had gained around 16 points in yesterday's choppy trade, dipped to 17,053.59 in opening trade. The wide-based National Stock Exchange index Nifty also fell by 42.10 points to 5,089.60. Brokers said the fall was triggered by weak global markets after subdued US data.