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Managing Gap Risk in Retail FX Customer Hedging

Article Quant Q&A · Author: xyzt

Summary

The document describes the gap risk a broker can face when it immediately hedges a customer's leveraged spot FX trade with a liquidity provider. If the market jumps through a liquidation level, the customer may incur a negative balance that cannot be recovered, while the broker's hedge can lose more than the customer's funded amount. The example illustrates how the broker's hedge can turn an otherwise profitable customer loss into a net loss for the broker.

An answer outlines two alternative liquidation approaches: executing customer liquidations at a less favorable fixed price than the trigger, with the difference earned in ordinary conditions to offset gap losses, or liquidating at zero against a participant taking the opposite side. It notes that calibration is difficult: customer treatment and potential disputes matter, while inadequate protection may leave the broker exposed in a market shock. The question also asks about options, but the answer does not develop an options hedge. These are discussion-level suggestions, not a quantified strategy comparison.

Key ideas

  • Immediate liquidity-provider hedging can leave a broker exposed to losses when prices gap through customer liquidation levels.
  • Unrecoverable negative customer balances can make the broker's hedge loss exceed the customer's funded loss.
  • A liquidation execution price set beyond the trigger could generate ordinary-condition gains to offset some gap losses.
  • The answer also describes liquidation against an opposite-side participant as an alternative structure.
  • The suggestions are not quantitatively tested, and the document does not detail an options-based hedge.

Tags

Full text
# Alternative strategies for hedging customer FX positions in spot market


# Alternative strategies for hedging customer FX positions in spot market












Generally, if an FX broker decides to hedge a customers' position, it automatically hedges the customer's trade to Liquidity Providers when the trade occurs in the spot market. Let's say, the customer buys EUR/USD, the broker also buys EUR/USD in the LP as quickly as possible. When the customer closes the position, the broker sells EUR/USD in the LP. By doing that, the broker becomes safe in terms of the price movements.

But there's a problem here. When a gap occurs, the customer gets stopped out with a negative balance and the same is true for the broker's position in the Liquidity Provider, the broker also loses money in the Liquidity Provider more than it should loose because of the price gap. The regulations do not allow the broker to request the customer to neutralize the negative balance. Let's say the customer lost all his money 100k and his balance is -5k because of the price gap but the broker can not request the -5k, so the income is 100k. Similarly, the broker lost $105k in the LP, the outcome is 105k, which causes 100k - 105k = -5k loss totally. So, the hedging operation caused a loss in this scenario.

Are there alternative ways to do this kind of hedging using some derivative instruments or different strategies?

Do you think there can be a solution by using FX options since it gives a right, not the obligation?

Thanks

## Answer by Lliane (score 1)

https://quant.stackexchange.com/a/51605

Yes, there are new ways to mitigate this since the CHF blowout a few years ago. Some people realized back then that there was a way to game retail FX brokers by having opposite leveraged positions and not paying negative balance.

For instance, some brokers set up a fixed liquidation execution price that is less favorable than the liquidation trigger price.

For instance let's say you buy EUR/USD at 1.13 with 50x leverage and that your account would be wiped out (0 margin value) at 1.11, the broker might then guarantee you a liquidation at 1.11 but trigger it once the spot reaches 1.1120 (broker hits the LP at 1.1120 but fills you at 1.1100). The broker will pocket the difference most of the time when people get liquidated in normal market conditions, and this should offset the cases where market gaps (opens directly below 1.1100).

Obviously this is not easy to calibrate for the broker, you don't want people to get liquidations at awful prices in normal times or they won't come back (or might sue you), and you don't want to wipe yourself out of existence either if there's a blowout.

Another way is to liquidate you at 0 against a short guy in the opposite direction, I've seen that on a bitcoin futures platform recently. I would not take it very well if I was the short guy but it is efficient.

There's an article about the crypto exchanges liquidations on March 13th, 2020 https://www.theblockcrypto.com/linked/58703/derivatives-market-liquidations-push-bitmexs-insurance-fund-to-all-time-high-cut-deribits-by-almost-half I'm no crypto evangelist, but they are far more transparent than retail leveraged fx/stocks platforms, Robinhood and IBKR surely have thousands of negative balance accounts now and we won't know about it before they get bailed out....

Shown in full with attribution under the source's licence. Licence: CC BY-SA 4.0 (Stack Exchange)

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.