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

BTC: 1 USD ETH: 0.2 USD 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. 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. Settlement price Time-weighted average price of the index price during the last 30 minutes before expiration.

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.

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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