Archegos Capital Management
A private investment office whose highly leveraged equity positions collapsed in March 2021, producing billions of dollars in losses for several global banks.
Last updated August 28, 2026
Overview
Archegos Capital Management was a New York-based private investment office founded and controlled by Bill Hwang, a former hedge-fund manager who had previously operated Tiger Asia Management. Unlike a conventional publicly marketed hedge fund, Archegos was generally described as a family office managing Hwang's own capital. Its activities nevertheless had a substantial impact on global financial markets because the office built very large economic exposures to a relatively concentrated group of publicly traded companies through derivatives, including total-return swaps, and financed those positions with borrowing from several prime brokers. The structure allowed Archegos to obtain exposure that was much larger than the capital it directly invested. Banks held the underlying shares or otherwise provided financing while Archegos received the economic gains and losses. Because the same or economically similar positions were financed by multiple banks, no single intermediary necessarily had a complete view of the office's aggregate leverage and exposure. This arrangement also enabled Archegos to avoid ordinary shareholder-disclosure thresholds that would have applied to direct holdings, although regulators and prosecutors later disputed whether aspects of the conduct violated securities laws. Archegos concentrated heavily in a number of media, technology and Chinese internet-related stocks. ViacomCBS, now Paramount Global, became one of the most visible positions. After a sharp rise in its share price, the company conducted stock offerings in March 2021. The subsequent decline in ViacomCBS and other positions caused the value of Archegos's collateral to fall rapidly. Prime brokers issued margin calls, and Archegos could not provide sufficient additional collateral. Starting on March 26, 2021, banks began liquidating large blocks of shares connected with Archegos. The sales occurred through block trades and other transactions, putting further pressure on affected securities. Credit Suisse, Nomura, Morgan Stanley, UBS and Deutsche Bank were among the banks exposed to the failure; Credit Suisse and Nomura reported especially large losses, while Goldman Sachs and Morgan Stanley were able to reduce their exposure more quickly. The episode became one of the largest failures of a private investment office in modern markets and prompted examinations of prime-broker risk controls, margining, counterparty information-sharing and the regulatory treatment of family offices and derivatives. Archegos did not continue as an operating investment business after the March 2021 liquidation. Investigations by United States authorities led to criminal charges against Hwang and other former Archegos personnel. In July 2024, a federal jury in New York found Hwang guilty on multiple securities-fraud, market-manipulation and related counts. The criminal proceedings and civil enforcement actions continued to define the firm's public legacy, alongside separate regulatory and legal actions involving the banks that financed it.
History
Archegos emerged in 2013 after Bill Hwang converted the activities associated with Tiger Asia Management into a private family office. Hwang had previously run Tiger Asia, an investment firm focused on Asian equities. Following a 2012 settlement with the U.S. Securities and Exchange Commission involving insider-trading allegations, Hwang was subject to restrictions on managing outside money and subsequently operated Archegos as a family investment vehicle. The office pursued aggressive, concentrated exposure to public companies. Its strategy relied heavily on financing from prime brokers and on derivatives, especially total-return swaps. A swap could give Archegos the economic performance of a large shareholding without requiring it to register the same direct position in its own name. The arrangement transferred market exposure to Archegos while leaving banks with collateral, financing and hedging responsibilities. Multiple banks financed similar positions, which increased the overall leverage of the structure and made the aggregate exposure difficult for any one bank to assess. Archegos accumulated positions in companies including ViacomCBS, Discovery, Baidu, Tencent Music and other media, technology and Chinese internet-related businesses. The office's gains during the rise in several of these stocks increased its borrowing capacity, but the same concentration made the portfolio vulnerable to a relatively small number of adverse price movements. In early 2021, Archegos was particularly exposed to the sharp appreciation and subsequent decline of ViacomCBS shares. ViacomCBS announced equity offerings in March 2021 after a substantial share-price increase. The stock then fell sharply, along with several other securities in which Archegos had large economic exposures. Prime brokers demanded additional collateral. Archegos could not satisfy all of the demands, and banks moved to close out positions. On March 26, 2021, Goldman Sachs and Morgan Stanley reportedly sold large blocks before some other counterparties, while subsequent sales by additional banks caused further market disruption. The collapse produced losses of more than ten billion dollars across the involved banks, with Credit Suisse and Nomura among the most heavily affected. The episode also prompted public criticism of the information asymmetry between prime brokers, inconsistent margin practices and the limited transparency surrounding family offices using derivatives. The SEC, the Federal Reserve, the Financial Stability Board and other authorities examined the failure and its implications for market stability and counterparty-risk management. Archegos ceased operating as an investment office after the liquidation. Hwang, chief financial officer Patrick Halligan, head of trading Scott Becker and other former personnel became subjects of criminal and civil investigations. The Department of Justice later charged Hwang and others with market-manipulation and fraud-related offenses. In July 2024, a federal jury convicted Hwang on multiple counts. The firm's history is therefore associated both with the growth of leveraged family-office trading and with renewed regulatory attention to synthetic equity exposure, prime brokerage and systemic counterparty risk.
- 2024Hwang is convicted
A Manhattan federal jury finds Bill Hwang guilty on multiple counts arising from Archegos's trading and financing activities.
- 2022Criminal charges are announced
The Department of Justice charges Hwang and former Archegos personnel in a market-manipulation and fraud case.
- 2021Leveraged positions expand
Archegos builds very large, concentrated economic exposures through total-return swaps and financing from several prime brokers.
- 2021Archegos collapses
Declines in key positions trigger margin calls and forced liquidations beginning in late March, ending the firm's investment operations.
- 2013Archegos is established as a family office
Bill Hwang establishes Archegos Capital Management after the earlier Tiger Asia business is converted into a private investment office.
Products and positioning
A private family office using leveraged, concentrated exposure to publicly traded equities, often through equity derivatives and prime-broker financing.
Private investment managementAsset management2013
Archegos managed capital for its founder and related family interests rather than operating as a broadly distributed mutual fund or conventional outside-capital hedge fund. The office expressed its investment views through concentrated positions in publicly traded companies and related derivatives.
Total-return swap exposureEquity derivatives
Total-return swaps gave Archegos the economic performance of reference shares while prime brokers arranged financing, held or hedged underlying securities, and received collateral. The structure amplified both returns and losses and allowed several banks to finance economically similar exposures.
Brand decisions
- 2021Use of concentrated synthetic equity exposureStrategy
Archegos sought large economic exposures to a relatively small group of public companies while working with multiple prime brokers.
What changed. The office used total-return swaps and borrowed financing to increase exposure beyond the capital directly invested in shares.
Aftermath. The strategy magnified losses when key stocks declined and contributed to the March 2021 default and liquidation.
- 2013Shift from outside-money hedge fund to family officeStrategy
After the earlier Tiger Asia business and related regulatory restrictions, Bill Hwang operated the investment activity as a private family office.
What changed. Archegos managed proprietary or family capital rather than broadly soliciting external investors.
Aftermath. The private structure later allowed the office to use substantial derivatives exposure without the public profile and reporting framework of a listed investment company.
Leadership
| Name | Title | Tenure |
|---|---|---|
| Bill Hwang | Founder and portfolio managerformer | 2013–2021 |
| Patrick Halligan | Chief financial officerformer | –2021 |
| Scott Becker | Head of tradingformer | –2021 |
Controversies
- 2024Criminal conviction of Bill HwangControversy
A federal jury convicted Hwang on multiple securities-related counts after a trial concerning Archegos's trading, communications and relationships with its lenders and counterparties.
- 2022Market-manipulation and fraud prosecutionControversy
U.S. prosecutors alleged that Hwang and former executives manipulated securities prices and misled banks and counterparties in order to expand Archegos's borrowing and trading capacity.
- 2021Archegos collapse and forced liquidationControversy
The firm's concentrated, leveraged equity exposures fell sharply, leading to unmet margin calls, rapid liquidation and billions of dollars in losses for prime brokers. The event raised concerns about leverage, derivatives transparency and counterparty-risk controls.
Recent events
- 2021Archegos defaults on margin calls and banks begin liquidating positions
The office failed to meet margin calls after declines in several concentrated positions. Prime brokers began selling large blocks of shares, creating losses for Archegos and its counterparties.
BankruptcyOther - 2021Credit Suisse reports major loss linked to Archegos
Credit Suisse disclosed a multibillion-dollar loss associated with the Archegos default and subsequently faced extensive regulatory and parliamentary scrutiny over its risk management.
OtherRegulation
Sources
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