Indian stocks opened lower Wednesday as the Bombay Stock Exchange benchmark index Sensex opening at 20, 830.93 points, 23.99 points or 0.12 percent down from the previous close of 20,854.92 points. The Sensex is under influence of the Wall Street and other Asian markets this week, as some economists have warned of imminent bubbles in the U.S. market and some emerging economies like Brazil.