Theindexpriceiscalculatedbasedontheweightedaverageofthelatesttransactionpricesfrommultipleexchanges.
Eachoptionscontracthasanindex.Forexample,BTC/USDToptionscontractsuseBTC/USDTindexpricetocalculate.Contractsforthesametokenwithdifferentexpirationdatesusethesameindexprice.Forinstance,BTCweekly,bi-weekly,andquarterlyoptionsalluseBTC/USDTindexprice.
Sampledatasampling:getthelatestpriceoftheexchangesinthetablethroughAPIevery6seconds(basedontheindexupdateinterval).
JPEX推出Crypto Punk & REDHARE NFT INDEX，以提供风险对冲工具:6月28日消息，JPEX最近推出了Crypto Punk & REDHARE NFT INDEX。整个系列的合约可以提供40倍杠杆，为主流NFT持有者提供对冲风险的投资工具。作为Crypto Punk资产持有者，当市场出现一定趋势时，用户可以通过JPEX做空Crypto Punk指数合约，通过对现货资产的风险对冲获得收益。
据悉，JPEX此前还推出了Bored Ape Yacht Club（BAYC）指数、CryptoPunks指数、Mutant Ape Yacht Club（MAYC）指数。（BeInCrypto）[2022/6/28 1:36:55]
Denominationcurrency:Ifthedenominationcurrencyofanexchangeisdifferentfromthedenominationcurrencyofatradingpair,thedenominationcurrencyoftheexchangewillbeconvertedintothedenominationcurrencyoftheindexpriceaccordingtotheexchangerate.
动态 | 加密货币交易所Coindirect在南非启动OTC交易:加密货币交易所Coindirect在南非启动OTC交易。首席运营官Nic Haralambous表示：“在开展业务的头两年，我们一直密切关注哪些用户在推动加密货币交易量。我们的方法是将加密货币带给尽可能多的用户，但是，数据显示，南非目前的大部分日常交易量都来自极少数交易者。”（Cointelegraph）[2019/9/28]
ExponentialExceptionHandling
Thepriceofasingleexchangedeviatessignificantlyfromotherexchanges.Solutionsareasbelow：Iftherearemorethan2validexchangeswithintheindices,whenthepriceofacertainexchangedeviatesmorethan±3%fromtheaveragepriceofotherexchanges,forsuchexchange,itspricewillbecalculatedas±3%oftheaveragepriceofotherexchanges:Forexample:Let'ssaytheBTCpriceofXexchangeis518USD,andthepricesofotherexchangesare500,501,502,503,504(USD).Theaveragepriceofotherexchangesis502.5,sothepriceofXexchangedeviatesfromothersby(518-502.5)/502.5=3.08%,whichismorethan3%.Insteadof518USD,systemwilltake502.5*(13%)=517.57asXexchange'sprice.Therefore,thefinalindexwillbe(517.57500501502503504)/6=504.59USD
Coindesk：共识大会拉升BTC :昨天晚间10点30分，BTC开始反弹，15分钟暴涨近400美元。分析认为，此番BTC反弹是受一年一度的“比特币共识会议”影响。根据Coindesk统计，每一次共识大会之后，币价均有不同程度的上涨：2015年会议期间，BTC增长23%，会议后两个月内涨幅121%；2016年会议期间，BTC涨幅10%，会议结束后两个月内涨幅78%；2017年会议期间，BTC涨幅69%，会议结束后两个月内涨幅138%。据悉，“比特币共识会议”已经举办了3届，Ripple、Wechain、微软和IBM等多家公司均参与此次会议，V神与OMG拒绝加入会议。[2018/5/15]
Ifthereareonly2validexchangesintheindex(thereareonly2exchangesintheindex,orduetomarketlosses,someexchangeswillbetemporarilyexcluded).Ifthepricedeviationobtainedbythetwoplatformsisgreaterthan25%,itisconsideredthatthepricedeviationfromtheindexpricecalculatedlasttimeisnormal,andtheotheronehasanoolongindex.Atthistime,theindexpricetemporarilyanchorstheexchangewiththenormalprice.
印尼最大数字货币交易所INDODAX用户量逼近国家证券交易所:INDODAX首席执行官表示Oscar Darmawan表示，每天有近3千新用户注册平台进行比特币、以太坊、瑞波等数字货币的交易。该平台有望在2018年底之前拥有150万个KYC注册用户。而拥有百年历史的印度尼西亚证券交易所，现拥有118万注册用户。[2018/3/15]
Iftheindexpriceisbasedonthepriceofonlyoneexchangeatatime(allotherexchangeshavebeenabnormallyremoved).Ifthedeviationbetweentheobtainedpriceandtheindexpriceobtainedattheprevioustimeisgreaterthan25%,itisconsideredthatthereisanoolongindex,andtheindexpriceistakenfromtheprevioustimeprice.
区块链媒体Coindesk已修复本周二无法更新的漏洞:知名区块链媒体Coindesk发布声明，就本周二网站无法更新作出解释并表达歉意。据该网站透露，他们的工程师已经修复漏洞，目前已经恢复正常。[2018/1/17]
Exchangemarketdataislost.Solutions：Ifacertainexchangefailstoobtainmarketdataatacertainpointintime(theexchangeisclosed,themarketisinterrupted,oranattackisencountered),thepriceatthatpointintimewillbecalculatedbasedonthelatestvalidpriceobtained.Ifthevaliddataobtainedbyanexchangeinthepast100datapoints(10min)islessthan10points(10%),wewillconsiderthepriceofthisexchangetobeuninstructiveandweightthepriceoftheexchange.Temporarilyadjustedto0.Aftertheexchangerecoversdata,ifatleast90ofthepast100datapointsarevalid(90%),thenwewillrestoretheweightoftheexchange.
Singleexchangepricesdeviatedsignificantlyforalongtime.Solutions：Whenthepriceofanexchangedeviatessignificantlyfromotherexchangesforalongtime,webelievethatthepriceofthatexchangemayloseitsguidingsignificance,andthesampleandweightoftheindexwillbeadjusted.Thespecificadjustmentplanissubjecttotheplatformannouncement.
ExchangeRateCalculation
Theexchangerateforperpetualswapsandoptionscontractsissampledfrom"Huobi",whichissampledeveryminute.
https://api.huobi.pro/general/exchange_rate/list
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