The downfall of Archegos
A huge fund rattled markets last week as it forced a fire sale of assets. Should you fear the knock-on effects?
Get the latest financial news, insights and expert analysis from our award-winning MoneyWeek team, to help you understand what really matters when it comes to your finances.
You are now subscribed
Your newsletter sign-up was successful
Want to add more newsletters?
Late last week, stockmarkets were rattled as the share prices of a handful of big-name tech and communications stocks – including Chinese tech giant Baidu and US media group ViacomCBS – plunged, as huge blocks of their shares were sold into the market. It turned out that a family office called Archegos Capital Management, run by former hedge-fund manager Bill Hwang, had run into trouble in the wake of a “margin call” (see below) from its lenders, triggering the sale of more than $20bn-worth of shares. So what happened, and is it anything that you need to worry about?
Archegos’s problems appear to have been triggered by ViacomCBS specifically. Between the start of the year and 22 March, shares in the media conglomerate almost tripled in value. Viacom decided to take advantage by issuing new shares. The share price fell, partly because existing shareholders would be diluted, but also because it had already seen such extraordinary gains, and no doubt some investors were looking for excuses to take profits. The decline appears to have triggered the margin call, and the resulting share sale exacerbated the decline.
Investment banks Goldman Sachs, Morgan Stanley, Credit Suisse and Nomura all provided “prime brokerage services” (the lending of cash and securities) to the fund. However, it looks as though the latter two have borne the brunt of the liquidation, by being later to sell than the former two. Both Credit Suisse and Nomura saw double-digit share-price falls early this week as they warned of potentially hefty first-quarter losses.
Try 6 free issues of MoneyWeek today
Get unparalleled financial insight, analysis and expert opinion you can profit from.
Sign up to Money Morning
Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter
Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter
This is all very well, but what does it mean for you? Previous big fund blow-ups include LTCM in 1998 (which was much more systemically important and was bailed out as a result), and Amaranth in 2006 (which lost billions betting on natural gas but had little wider market impact). So far it looks as though Archegos is more like the latter. It’s embarrassing for the banks involved to have enabled such extraordinary levels of leverage – as Robin Wigglesworth puts it in the Financial Times, Hwang’s strategy looks “like a Reddit day trader got access to a Goldman Sachs credit card and went bananas” – but so far losses are contained.
But wary investors might note that past blow-ups have occurred closer to market tops than bottoms. One reason Hwang could borrow and bet so heavily is that investors are fear missing out on gains more than losing money. But when that mood turns, profits can evaporate fast. The biggest risk, says Wigglesworth, may be that “a debacle of this magnitude encourages the entire investment banking industry to scale back how much leverage they offer”. The main consolation is that would most likely hit the most expensive parts of the market hardest.
Get the latest financial news, insights and expert analysis from our award-winning MoneyWeek team, to help you understand what really matters when it comes to your finances.

-
Financial education: how to teach children about moneyFinancial education was added to the national curriculum more than a decade ago, but it doesn’t seem to have done much good. It’s time to take back control
-
Investing in Taiwan: profit from the rise of Asia’s Silicon ValleyTaiwan has become a technology manufacturing powerhouse. Smart investors should buy in now, says Matthew Partridge
-
How a dovish Federal Reserve could affect youTrump’s pick for the US Federal Reserve is not so much of a yes-man as his rival, but interest rates will still come down quickly, says Cris Sholto Heaton
-
Why it might be time to switch your pension strategyYour pension strategy may need tweaking – with many pension experts now arguing that 75 should be the pivotal age in your retirement planning.
-
Star fund managers – an investing style that’s out of fashionStar fund managers such as Terry Smith and Nick Train are at the mercy of wider market trends, says Cris Sholto Heaton
-
How to add cryptocurrency to your portfolioA new listing shows how bitcoin might add value to a portfolio if cryptocurrency keeps gaining acceptance, says Cris Sholto Heaton
-
Investing in forestry: a tax-efficient way to grow your wealthRecord sums are pouring into forestry funds. It makes sense to join the rush, says David Prosser
-
The MoneyWeek investment trust portfolio – early 2026 updateThe MoneyWeek investment trust portfolio had a solid year in 2025. Scottish Mortgage and Law Debenture were the star performers, with very different strategies
-
Pundits had a bad 2025 – here's what it means for investorsThe pundits came in for many shocks in 2025, says Max King. Here is what they should learn from them
-
New year, same market forecastsForecasts from banks and brokers are as bullish as ever this year, but there is less conviction about the US, says Cris Sholto Heaton