New Delhi: Leading exchange BSE has cautioned traders and investors against unsolicited messages being circulated by unregistered entities to induce investment and sale of shares. The direction has come after BSE and markets regulator Securities and Exchange Board of India (Sebi) noticed that "unsolicited messages are being sent to induce investment or sale of the stock of certain listed companies, indicating target prices by unregistered or unauthorised entities". "Trading members are requested to advise their clients to remain cautious on such unsolicited messages being circulated by unregistered or unauthorised entities," BSE said in a notice dated November 17. The exchange also said that in case the trading member "suspects that there is an unusual trading pattern" by any client then it should release the payout only after carrying further scrutiny of KYC documents to compare income range declared and value of such transaction.