$CN HEALTH TECH(01069.HK)$ I see a lot of people posting about various whatsapp groups. Legitimate brokers / traders are NOT using whatsapp (at least in the US) to provide stock recommendations. If they are - search for a different broker. I would also not buy a stock on a recommendation from someone you never met before. Also keep in mind that generally speaking - stocks dont increase that much in one - two days with little news. This was a classic pump & dump. The stock was worthless before the recommendation and is worthless shortly after. If you receive a stock tip - do your own research before buying.
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