### Cross Margin and Portfolio Margin
* OptiFi is the first derivatives DEX that utilizes both Cross Margin and [Portfolio Margin](/optifi/optifi-in-depth/margin-requirements/portfolio-margin.md) across all financial instruments with the same underlying
* Allow users to build complex strategies written on a single underlying without the burden of multiple margin requirements. Have “risk-sharing” features to “net” the overall portfolio risk to **enhance capital efficiency**
### Partial Liquidations
* [Liquidations](/optifi/optifi-in-depth/margin-requirements/liquidation-mechanism.md) happen gradually by reducing the riskiest positions first ensuring **fair liquidation and pricing** for all users
* Leads to a **smaller liquidations, lower fees and higher user returns**
### Derivatives OptiFi Market Maker (OMM)
* The first-ever [Delta-neutral OMM vault](/optifi/optifi-in-depth/optifi-market-maker-omm.md) created by OptiFi
* It is designed to **generate yield to its depositors (LPs)**, more importantly, to **keep continuous liquidity** across all financial instruments traded in OptiFi exchange
* Systemic risk management and **delta-hedging** (through [Mango](https://www.mango.markets/)) is considered to maintain safe risk limits
### Market Maker (MM) Incentive Program
* MM Program is designed to encourage professional market-making within OptiFi exchange
* Innovative approach to promote “good” market-making practices. MM pool subscribers receive **exchange fee revenue share** while being subject to penalties for “bad” market-making practices
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