For a growth company: no jobs page. If a company is in a fast growing industry and they are not hiring people, it's a red flag.
I invested in an electric vehicle company (GreenPower Motor). They are in a fast growing industry and all of their competitors has jobs pages on their websites, but not GP. That was a red flag. It prompted me to search more. Eventually a shortseller report came out and it was revealed that the company was a scam.
kats_
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You must clearly understand the listed company, which industry sector it belongs to, its position in the sector, future development plans, and so on.
LeliPad : Thank you for sharing your experience, it is indeed an important reference
kats_ : You must clearly understand the listed company, which industry sector it belongs to, its position in the sector, future development plans, and so on.
Mikey_Vibez : This type of scam requires very strong observation to discover
102556873 : Sharp