When you don't enforce separation of duties your traders have more rights than they need.
When you traders have more rights than they need they trade ETFs because they know you are not logging them.
When your traders will make a series of bets using ETFs that various European markets will rise. sometimes they will be wrong.
When your traders think have a high level of certainty they will trade with unhedged futures.
When your traders trade with unhedged futures, their managers should catch this as a risky bet.
When your traders used to be in IT, they will still have rights to remove log data about trades in case the trader is wrong.
When the trader is wrong, they will seek to double down to make it back.
When your traders double down, sometimes they will be wrong.
When your trader is wrong, they will double down again.
When your managers read the logs they will not see data about highly leveraged, risky ETF bets in logs.
When the futures contract comes due, your bank will be out $5 Billion
When the bank loses $5 Billion you will have legal proceedings.
When you have legal proceedings, you will have to backpack and walk from Rome to Paris.
Don't backpack and walk from Rome to Paris, switch to separation of duties, role based access control, resource limitations, and access reviews.