Purification for Halal stock

Salam brothers,

Is there any easy way to purify halal stock? For example, shares of BP oil, Easyjet are considered halal (FTSE equities) as suggested by IFG. Let’s say if you make £50 profit after selling the shares, how much would you donate to charity to purify this income? Or you don’t need to donate.

Many thanks

2 posts were merged into an existing topic: Fatwa: Is share/stock trading halal? Can you invest in the stock market?