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 showed expectations of a profit of 3 billion rupees.

The message proved prescient: On July 27, Dr. Reddy's (>> Dr.Reddy's Laboratories Ltd) reported a loss of 587 million rupees (6.8 million pounds) under Indian accounting standards.

The chief executive of Dr. Reddy's said quarterly results were "below expectations", sending shares down as much as 4.4 percent.

After the Reuters story was published on Nov. 16, Dr. Reddy's said that it had posted a net profit of 591 million rupees for that first quarter of the fiscal year ending in March 2018 under the global IFRS accounting standard.

The company further reiterated that they "have adequate processes and controls in place in terms of confidentiality and security of information."

The post that circulated in the WhatsApp group three days earlier had predicted a loss of more than 500 million rupees.

A person who identified himself as Vass returned a call from Reuters using the telephone number from which the Dr. Reddy's numbers had been posted on the WhatsApp group. He denied writing or sharing posts in the group, adding later in a separate WhatsApp message from the same number that it was "totally baseless" that he had done so.

Reuters has documented at least 12 cases of prescient messages about major Indian companies, including Dr. Reddy's, being posted in private WhatsApp groups.

Two of the messages appeared in the transcripts of six groups reviewed by Reuters, including the "Market Chatter" group where the Dr. Reddy's numbers appeared. The others were shared on condition of anonymity by two other members of other WhatsApp groups.

The posts with prescient numbers in the WhatsApp groups were circulated hours or days before official company statements.

The messages shared could involve lucky guesses or astute forecasts based on publicly available information, and not all metrics shared among the 12 cases were exactly the same as reported.

Reuters could not determine where the numbers posted on the WhatsApp groups originated or whether any of the market participants who received the messages had traded on the basis of the numbers they had seen.

According to two lawyers who were formerly senior officials at the Securities and Exchange Board of India (SEBI), the country's capital markets regulator, if any numbers being posted on WhatsApp groups were determined by regulators to be "unpublished price-sensitive information", the people circulating them would be breaking the law.

"The mere sharing of information that could be unpublished insider information is outlawed, even if you don't misuse the information to trade on it," said Sandeep Parekh, a lawyer with Finsec Law Advisors who used to head SEBI's enforcement division.

SEBI did not respond to requests for comment. After Reuters published this article, the regulator said that it would investigate the matter.

India significantly toughened insider trading rules in early 2015, expanding what constitutes "unpublished price-sensitive information" to include "any information" that is not "generally available" and that could have a market impact.

The law also expanded the scope of who constitutes an "insider" to include "anyone in possession of or having access to unpublished price-sensitive information" regardless of how they came "in possession of or had access to such information".

"You don't need to have gotten inside information from a company. You could get it from anywhere," said Vaneesa Agrawal, a partner with Suvan Law Advisors who formerly worked in SEBI's legal department. "As soon as you have information that could be insider information you are an insider, and you are not supposed to either pass it on or trade on it."

Circulating "unpublished price-sensitive information" can result in penalties of up to 250 million rupees and a jail term of up to 10 years. The monetary amount can be higher if it can be proven that an individual traded on such information.

ICICI Securities said in a statement that it had "zero tolerance towards any dissemination of unpublished price sensitive information and has an appropriate framework to safeguard confidentiality of information."

Dr. Reddy's said it was "not aware of any information related to its financial results being circulated externally ahead of statutory disclosures that are made officially by the company."

MESSAGING THROUGH WHATSAPP

The messages about the 12 companies with prescient information obtained by Reuters involved mostly what were characterised as being upcoming quarterly results, including specific metrics such as net profits, revenues and operating margins.

They also included messages about upcoming bonus share issues or revenue guidance.

Seven of the companies are part of the benchmark NSE index <.NSEI>: Dr. Reddy's, the drug maker Cipla Ltd (>> Cipla Ltd), Axis Bank (>> Axis Bank Ltd), HDFC Bank (>> HDFC Bank Limited), Tata Steel (>> Tata Steel Limited), the IT services company Wipro (>> Wipro Limited), and Bajaj Finance (>> Bajaj Finance Ltd). The other five were Mahindra Holidays and Resorts (>> Mahindra Holidays & Resorts India Ltd.), Crompton Greaves Consumer Electricals Ltd (>> Crompton Greaves Consumer Electricls Ltd), the IT services providers Mindtree Ltd (>> MindTree Ltd) and Mastek Ltd (>> Mastek Ltd), and India Glycols (>> India Glycols Ltd.), a petrochemicals company.

Wipro, Bajaj Finance, HDFC Bank, Mastek, Crompton Greaves, Cipla and Mahindra Holidays said they were not aware messages referring to their upcoming results or announcements had circulated in WhatsApp, and that the companies adhered to strict standards of guarding sensitive company information.

Axis Bank, Tata Steel, India Glycols, Mindtree did not reply to requests for comment.

WhatsApp, which is owned by Facebook (>> Facebook), responded to a request for comment by pointing to its terms of service, which state users can use the platform only for "legal, authorized, and acceptable purposes".

HEARD ON THE STREET

Many of the postings in the WhatsApp groups are referred to as "HOS", for "Heard on the Street".

In one typical post on July 25, Fanil Motiwalla, a contractor for a small brokerage, Arcadia Share & Stock Brokers, posted a set of numbers for Axis Bank, India's third-largest private lender. Motiwalla works as a sub-broker, who are typically hired as contractors by securities firms in India to recruit customers.

"This HOS is going around for Axis," Motiwalla said when posting the numbers, which included key metrics such as gross non-performing assets and net interest margins.

Later that day, Axis Bank reported results that closely matched the final numbers in Motiwalla's message.

Arcadia said it had policies in place to prevent employees from passing on "illegal information".

Motiwalla said he just reposted a message that had already been circulating in the market and he did not consider it inside information.

"How do I know if this is coming from inside information? This could come from many sources," he said. "This information comes from different groups, and we just post it."

Arcadia said every sub-broker it hired was given a copy of SEBI's rules, adding, "whatever the alleged message sent by him is not sourced from Arcadia," referring to Motiwalla.

(Reporting by Rafael Nam; Additional reporting by Euan Rocha; Editing by Paritosh Bansal and Philip McClellan)

By Rafael Nam