What is the ruling on writing in forums about the rules of investment and speculation in stocks in general, and offering advice to speculators, without specifying a particular stock?

The ruling on writing in forums about the rules of investment and stock speculation depends on the content of what is written. If the content plans for or encourages what is forbidden, such as theorizing about usurious transactions or promoting institutions that do not adhere to Islamic law, then it is forbidden. However, if it encourages adherence to the Islamic system, explains the harms of usury, warns against Shariah violations, and is limited to giving advice on permissible matters, then it is correct.