The US topped the ranking with an overall market cap of USD 47.32 trillion, followed by China (USD 11.52 trillion), Japan (USD 6 trillion), and Hong Kong (USD 5.55 trillion).
Indian Railways tested 'Kavach', an automatic train collision protection system by making two trains hurtle towards each other at full speed today, one with the Railways Minister Ashwini Vaishnaw and another with Railway Board chairman on board.
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