I’ve recently opted in to receive Interest On Cash and ever since my account seems to decline steadily after I make a good trade.
For example yesterday I made a trade which resulted in ($111) ÂŁ86 gain with no FX fees (since I only trade US stocks and store the money in $)
Then later today all those gains have since gone

This happens every time I make a good trade

To the point which this steady decline outpaces my daily interest and stock gains (BTW I haven’t had a bad trade this past week).
Would appreciate if someone could help.
(PS I’m aware that in the T&C of IOC it states that when opting in your account balance can go down since it’s invested in QMMFs)