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Here is the e-mail I received on the 18th May 2018.
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This is a gentle reminder that the new 50% margin close-out rule will come into effect in 1 week's time on 26th May.
This is the first of a number of changes the European Securities and Market Authority (ESMA) will be introducing that will impact your trading activity with us. As a highly valued ETX trader, we are committed to making these new requirements as manageable as possible for you.
Please note, the close-out rule will apply to Retail and Professional clients in this instance. If you are still unsure of the impact of the 50% close-out rule on your trading, simply get in touch with our Client Services team, who will help you with any questions on +44 (0) 20 7392 1494 or firstname.lastname@example.org.
How will the new margin close-out rule work from 26th May? •When your account equity falls below 100% of the minimum required margin for your open position(s), you are at risk of being closed out.
•Once your equity falls below 50%, your positions are reduced to bring your account equity back over 50%.
•Any open positions on 26th May will become subject to the new margin close-out rules.
Example scenario under the new 50% close out rule
You have £1,000 in your account and you open a UK 100 position that requires £500 margin. If that position runs a loss of £750, you will have £250 equity remaining after the running loss, which is 50% of the £500 margin required to cover the open position. In this scenario, under the new rules, we will need to reduce or close this position until your account equity reaches 50% of the £500 margin required to cover the open position.