Dear customers, We are pleased to announce that ELT (Element Black) will be part of our token sale project on OKX Jumpstart starting at 2:00 am UTC on Apr. 20, 2022. I.

OKX is pleased to announce the listing of Element Black’s ELT token on our spot trading markets.

After multiple unsuccessful attempts to communicate with Element Black, the OKX team notified Element Black to carry out internal rectification and follow the Road Map disclosed prior to the listing for product delivery. Withdrawal restrictions were implemented on the ELT market-making account. During the rectification period, the Element Black team made several withdrawal requests, and OKX approved some reasonable requests, after careful review.

OKB black hole address: https://etherscan.io/address/0xff1ee8604f9ec9c3bb292633bb939321ae861b30#tokentxns) By reducing the total supply in circulation, we hope OKB supporters can benefit from the increase and stabilization of value of OKB. The amount of OKB acquired through Burn between May 4 and May 31, 2019 is 1,929,043.01 , which have already been sent to the black hole address. Regards, OKX May 10, 2019

In traditional options trading, delta and gamma, as known as BS delta and BS gamma, are derived from the Black-Scholes or Black options pricing model. BS delta measures the rate of change of the option price relative to the change of underlying price. BS gamma measures the rate of change of BS delta relative to the change of underlying price. For the OKX BTCUSD options contract, the calculation of delta and gamma is different from the traditional way.

The BTC/ETH prices of these orders are continuously updated using the Black-Scholes (BS) options pricing formula once they're placed in the order book, such that the corresponding IVs of the orders remain close to the levels you specify. The BTC/ETH prices of these orders are updated every 3 seconds in the order book. Limit orders based on USD price You can place a limit order with a USD price to specify the target price level of your options contract.

Mark Price Determined by OKX using the Black model on a real-time basis. Implied volatility is derived from market data, along with the volatility cap and floor. Creation Time Options with new expiration date are created at 8:30 UTC. Expiry Time 08:00 (UTC) on the expiration date Settlement Price Time-weighted average price of the index price during the last one hour before expiration. (The snapshot of the index price is taken at 200ms interval) Please refer to option settlement price history.

After the burn, all OKB transferred to the black hole address will be automatically burned, manual OKB burns will stop, and the total supply of OKB will be fixed at 21 million.Will OKT deposits now also be exchanged at the same average closing price? Yes. OKTChain will continue operating until January 1, 2026. Before this date, you can deposit OKT to the platform at any time.

Mark Price Determined by OKX using the Black model on a real-time basis. Implied volatility is derived from market data, along with the volatility cap and floor. Creation Time Options with new expiration date are created at 8:30 UTC. Expiry Time 08:00 (UTC) on the expiration date Settlement Price Time-weighted average price of the index price during the last one hour before expiration. (The snapshot of the index price is taken at 200ms interval) Please refer to option settlement price history.

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