How a single family office triggered a $30 billion financial collapse

Wars & Conflicts · Published 16 October 2026 · Updated 25 October 2026 Swipe more like this →

In short: In March 2021, the sudden default of Archegos Capital Management sent shockwaves through the global banking system. Using highly leveraged swaps to hide massive market exposure, Bill Hwang managed to accumulate positions that, when they failed, inflicted devastating losses on some of the world's most prominent investment banks.

Bill Hwang, a former 'Tiger Cub' protégé, built a financial empire that peaked with an estimated personal wealth of $10–15 billion. After closing his hedge fund, Tiger Asia Management, following a 2012 settlement regarding illegal use of inside information, Hwang transitioned to a less regulated 'family office' structure: Archegos Capital Management. By 2012, this entity managed approximately $10 billion.

The mechanism of the collapse lay in the use of total return swaps. Through these instruments, Archegos could take highly leveraged positions—believed to be at a 5:1 ratio—across companies like ViacomCBS and Baidu. Because the issuing banks held the actual shares, Hwang could circumvent disclosure requirements, keeping the true scale of his market exposure hidden from regulators and the public.

The fragility of this strategy shattered in late March 2021. As stock prices declined, Archegos faced mounting margin calls. Despite pleas from prime brokers like UBS and Credit Suisse to liquidate positions, Hwang resisted. The resulting default led to the liquidation of positions worth nearly $30 billion, causing 'substantial' losses for banks including Nomura, Goldman Sachs, and Morgan Stanley. The fallout was so severe that Credit Suisse eventually shut down its prime brokerage business in November 2021 after absorbing $5.5 billion in losses.

In July 2024, a Manhattan jury convicted Hwang on 10 of 11 counts, including securities fraud and racketeering. Though he was sentenced to 18 years in prison in November 2024, he remained out on bail as of March 2026 while appealing the verdict. His fall from a multi-billionaire financier to a convicted fraudster serves as a stark warning regarding the systemic risks of unregulated leverage.

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