Topreventthemaliciousmanipulationofthemarket,HuobiFutureslimitstheopeningandclosingpriceofoptionscontractsforeachtoken.
Optionsbuyers(buycallorputoptions)shouldfollowtheplatform’shighestlimitpricewhiletheoptionssellershavetofollowtheplatform’slowestlimitprice.Thecalculationmethodsareasbelow:
Pricelimitruleforcalloptions:Thehighestbuyprice=min{OptionsmarkpriceMaximumincrease,Indexprice}
Thelowestsellprice=max{Optionsmarkprice–Maximumdecrease,Minimumtick}
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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