Bollywood stars Shah Rukh Khan and Kajol have become the first Indian actors to ring the opening bell of the world's biggest stock exchange, NASDAQ, an honour usually reserved for CEOs of major corporations.

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The actors who are in the US to promote their upcoming film, "My Name Is Khan" releasing Feb 12, came to NASDAQ and rang in the first trading day of February at 9.30 a.m. Monday at a ceremony broadcast live on many television networks across the globe.

With over 3,700 companies listed, the NASDAQ has more trading volume than any other stock market in the world.