It's been a rough week for markets, with two big stories dominating the headlines: a selloff in AI-linked bonds and a stark warning for Indonesia's stock market. Both are reminders that the easy money of the past few years can turn quickly when investors start asking hard questions.
AI debt: the party might be over
The trouble began with CoreWeave, a 'neocloud' company that has borrowed heavily to rent out AI computing power. Its bonds sank as investors worried that the firm's spending would outstrip its earnings. The cost of insuring CoreWeave's debt against default hit a record, a sign that lenders are getting nervous.
But the selling didn't stop there. Neocloud rivals like Nebius also saw their bonds fall, and even bonds funding data centers leased to 'safe' tenants like Meta and Microsoft slumped. The worry there wasn't default, but rather building delays caused by power shortages, local opposition, and construction setbacks. In other words, even the most creditworthy tenants can't help if the data centers aren't built on time.
This is a classic sign of a market that's been running on optimism and is now starting to price in risk. For years, AI-related companies have been able to borrow cheaply to fund massive expansion. But as interest rates stay higher for longer, the math gets harder. After September's hotter-than-expected US inflation report, most traders expect the Federal Reserve to raise rates again by December, which will bite the companies that borrow to build hardest.
Research firm Gartner thinks most of the neoclouds won't make it alone: it predicts that over 80% will stop operating independently by 2030, as costs pile up and returns disappoint. That's a stark warning for a sector that has attracted billions in investment.
The pain could spread
Oracle has also borrowed heavily, in part to build data centers for OpenAI, its biggest customer. Its credit rating is now only one notch above 'junk'. A further downgrade could force institutional funds that are restricted to holding only investment-grade debt to sell, which would put more pressure on the company's bonds and stock.
Nvidia, the chipmaker that has been the biggest winner of the AI boom, is also exposed. It has invested tens of billions into AI startups and into the cloud providers that buy its chips. So trouble for its customers could hit it twice: through lost sales and soured investments. The chipmaker shed about $270 billion in market value this week, a sign that investors are starting to worry about the sustainability of the AI trade.
This doesn't mean AI demand is fading. But it shows how tightly intertwined the industry's finances are, and why the bond market, which often spots trouble first, is worth watching. For everyday investors, this is a reminder that the AI boom is not just about exciting technology—it's also about debt, leverage, and the risk that comes with it.
Indonesia's MSCI warning
In a separate but equally significant story, Indonesia might be facing relegation from the emerging market (EM) league. MSCI, a global stock market index provider whose EM benchmark is tracked by billions of dollars in investment funds, has been pressing Indonesia to tackle concerns over market manipulation, insider trading, poor corporate disclosure, and the tight grip that founders and families have on many listed companies.
In January, MSCI warned that Indonesia could be downgraded one notch to a 'frontier' market. But on Friday, it went a step further: it declared that unless Indonesia cleans up its act, it'll get knocked down two notches to 'standalone' status. MSCI will make up its mind by June 30th. If it does boot Indonesia out of its indexes, that would force passive funds with billions of dollars in the country's stocks to dump their holdings.
Indonesian stocks plunged over 10% on Friday—their biggest one-day drop since January 1998. The timing couldn't be worse: Indonesia was already the world's worst-performing stock market this year, with Friday's selloff now taking its losses to 40%. It's a reminder that although EM stocks offer the potential for high returns, that comes with a hefty dose of risk.
What it means for investors
If you're invested in a fund tracking the MSCI EM Index, Friday's tremor probably barely registered: Indonesia makes up less than 1% of the benchmark. More worrying is the fact that three stocks—TSMC, Samsung Electronics, and SK Hynix—account for 30% of it. With these firms riding the same AI boom that's powering developed-market stocks, EM stocks might not offer much diversification. In fact, they could be more correlated with US tech than you think.
For those with money in AI-related stocks or bonds, the takeaway is to be aware of the risks. The bond market is often the first to signal trouble, and right now it's flashing yellow. That doesn't mean you should panic, but it's worth understanding that the AI boom is built on a lot of borrowed money, and that debt has to be paid back.
As always, diversification is key. If you're heavily exposed to AI or tech, consider whether you're comfortable with the risk. And if you're in EM funds, remember that a few big names can drive the whole index.
