The Bombay Stock Exchange benchmark index Sensex on Monday gained over 194 points to trade over 17,000 points level. The Sensex was trading 17037, up by over 189 points when reports last came in. Similarly, the wide-based National Stock Exchange index Nifty also gained 58points to 5,058. Brokers said pick up in buying by foreign funds, sparked by firming trends on the other Asian markets in line with Friday's gains on the US market.