# Cross Margining ⎊ Area ⎊ Resource 11

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## What is the Optimization of Cross Margining?

Cross Margining is a capital efficiency optimization technique applied to accounts holding offsetting positions across different derivative instruments or asset classes. This process recognizes that the net risk of a diversified portfolio is lower than the sum of individual position risks. By netting positive and negative mark-to-market values, the required margin is reduced significantly.

## What is the Capital of Cross Margining?

Lowering the total capital requirement frees up resources for deployment elsewhere, enhancing the overall return on equity for sophisticated trading desks. This mechanism relies on sophisticated risk engines that accurately model the correlation and diversification benefits between, for example, an equity option position and a crypto futures position. Effective implementation maximizes portfolio utilization.

## What is the Risk of Cross Margining?

While promoting efficiency, this technique necessitates a holistic view of total portfolio risk exposure, as the correlation assumptions underpinning the netting can break down during extreme market dislocations. A failure in one area can rapidly propagate across the entire netted structure if the underlying risk model is flawed. Prudent risk management demands rigorous backtesting of these netting assumptions.


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## [Derivative Trading](https://term.greeks.live/term/derivative-trading/)

## [Derivative Settlement Security](https://term.greeks.live/term/derivative-settlement-security/)

---

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**Original URL:** https://term.greeks.live/area/cross-margining/resource/11/