ANSWER:

If you mean by intraday is buying and selling on the same day, this is only permissible when there is no obligation to sell at a specific time. 

This means if you buy stocks in the morning, you can keep them for as long as you wish and no one can force you to sell. 

If this is the case, you can buy and sell on the same day if you wish as long as the stocks you are buying are halal and they are not financing their projects in haram or receiving haram interest on their deposits. 

Is buying shares/stocks of a shariah compliant company and selling it within a day even an hour or few haram? Couldn’t find reasonable answers online.

Islamic economy | July 27, 2020 9:56 am
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Regarding the car purchased on installments from Abdul latif Jameel, a person paying installment sells me the car. His last payment is pending. He makes a deal with me and I give him last payment. He pays it. This is done with the consent of the actual owner Abdul Lateef Jameel, & they will transfer car ownership to my name directly. is this transaction halal for buyer? if not is it riba?
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One of my family member is going to buy me a phone through online by using his ‘CREDIT CARD’and paying the amount in INSTALLMENTS, If he is late to pay then he has to give ‘FINE’. Is it permissible for me to buy that phone from him if i know this is the case?