In regards to VN30 Index futures, the maturity date is set to be the third Thursday of the maturity month. When you trade with KBSV, please note that there is a difference in clearing method between trading shares and futures. In trading Index futures, you would need daily clearing of your derivatives account. Hence during the effective period of the contract, you will see daily changes in your derivatives account according to the reference price of respective Index futures.
However, on the maturity date, please note the following payment method characteristic:
For example: Let’s assume you have entered in a long position of VN30 Index futures: VN30F1903 with a set maturity date on 21st March, 2019 and its strike price is 920.
On 21st March 2019 here are the information:
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The closing price of this contract is 925.0
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The ATC closing price of VN30 Index is 926.09
In this particular situation, if you place a reverse order to crystalize your position, the closing price of futures contract will be used, in this case 925. However, if you do not take any action to close your position, yours will be settled based on the ATC closing price of VN30 Index which is 926.09