Options Price Limit Mechanism

Topreventthemaliciousmanipulationofthemarket,HuobiFutureslimitstheopeningandclosingpriceofoptionscontractsforeachtoken.

Optionsbuyers(buycallorputoptions)shouldfollowtheplatform’shighestlimitpricewhiletheoptionssellershavetofollowtheplatform’slowestlimitprice.Thecalculationmethodsareasbelow:

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Pricelimitruleforcalloptions:Thehighestbuyprice=min{OptionsmarkpriceMaximumincrease,Indexprice}

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Thelowestsellprice=max{Optionsmarkprice–Maximumdecrease,Minimumtick}

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Maximumincrease=max{Optionsindexprice*M,min*N}

Maximumdecrease=Optionsindexprice*K

Pricelimitruleforputoptions:Thehighestbuyprice=min{OptionsmarkpriceMaximumincrease,Strikeprice}

Thelowestsellprice=max{Optionsmarkprice–Maximumdecrease,Minimumtick}

Maximumincrease=max{Strikeprice*M,min*N}

Maximumdecrease=Optionsindexprice*K

Amongwhich，M=0.5%，N=10％，K=10％

Bothopeningpositionsandclosingpositionsarelimitedbypricelimitmechanism.Ifusersbuytoopenorbuytoclosepositions,hardpricelimitwillbetriggeredwhenthetypepriceishigherthanthehighestbuypriceinthemarket;ifusersselltoopenorselltoclosepositions,hardpricelimitwillbetriggeredwhenthetypepriceislowerthanthelowestsellprice.

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