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Btw I made my research about this and large companies in London, UK used (maybe still using) this method to pay bonuses to their managers because the top capital gains tax rate is just 28% while the highest income tax 45% plus other levies so they instructed their highest paid employees to open a position with a certain currency pair and they opened on the opposite side. This way they paid millions of pounds and both parties avoided a lots of taxes.
After a while HMRC (UK tax authorities) said it's tax avoidance and they have to pay up the difference however they did this on a large scale.
Other companies in the finance sector still using this method because it's literally impossible to detect the transactions with banks, hedge funds and insurance companies.