Three days before Dr. Reddy's Laboratories Ltd announced quarterly results this summer, a message circulated on a private WhatsApp group saying the Indian drugmaker would not post good numbers.
Dr. Reddy's was going to report a loss, according to the message on the "Market Chatter" group, which was posted on July 24 from a mobile phone number that Reuters traced back to Nishant Vass, an auto analyst at ICICI Securities, a leading Indian brokerage. The WhatsApp group had 45 members, mostly traders.
The loss would have been a surprise to many analysts, as consensus forecasts compiled by Thomson Reuters at the time

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