Negative balance on the trading account - whose loss?

 
Hello. In some cases, a negative balance (loss) may occur on trading accounts, I had it once when I opened a deal with a very large volume and got into a strong gap.

The question is whose loss is it: a client, a broker or a broker's liquidity provider?
 
Igor Yeremenko:
Hello. In some cases, a negative balance (loss) may occur on trading accounts, I had it once when I opened a deal with a very large volume and got into a strong gap.

The question is whose loss is it: a client, a broker or a broker's liquidity provider?

The loss is the trader's.

Some brokers offer negative balance protection though.

 
Keith Watford:

The loss is the trader's.

How can a broker demand (recover) this from a trader?
 
Igor Yeremenko:
How can a broker demand (recover) this from a trader?

They will ask you nicely and then they will demand it legally (if they don't offer negative balance protection, that is).