JSOP is correct posting and stating:
https://www.interactivebrokers.com.hk/en/index.php?f=564
- We manage our brokerage and market making businesses in separate companies, which are registered with local securities and/or commodities regulators. We maintain strict systematic and procedural separation between the two business lines and we do not commingle or utilize client-segregated assets for proprietary operations. Although certain affiliates of IBKR trade for their own account, our client-facing businesses do not conduct proprietary trading. We have completed the winding down of the bulk of our market making operations.
IB was initially founded as Timber Hill and were pioneers in electronic trading and market making. As the options game shifted in the states toward payment for order flow and HFT which weren't areas the firm (our chairman) wanted to pursue, the firm shifted its focus towards its burgeoning brokerage business. As someone who was with Timber Hill from the early days and can tell you first hand that controlling risk was and still is the primary focus of our firm.
For client safety IBG has a history of retaining earnings and building our capital which is now well over $8.5 billion USD. Please read the info under the link below for pointers on our strength and security. One item I find most compelling to offer confidence to clients is that management and staff have significant skin in the game ultimately owning over 80% of the company. As stated under the link below: Unlike at most other firms, where management owns a relatively small share, we participate substantially in the downside just as much as in the upside. Because of this vested interest, we run our business conservatively.
https://www.interactivebrokers.com.hk/en/index.php?f=2334
Hope this info provides you some comfort.
Note: correction to initial post. Sleeping today. as/of last quarter, equity was at $8.5B USD.