Bond Market Signal Last Seen in 2025 Tariff Shock Flashes Again

What Is Happening in the Bond Market?

Global corporate bond yield premiums have jumped to their highest levels since May 2025, according to data from a Bloomberg index.

Investors are demanding extra yield to hold corporate debt. These risk premiums climbed as high as 129 basis points as worries mounted over companies borrowing heavily to fund artificial intelligence (AI) projects.

At the same time, rising geopolitical tensions are making investors cautious. Instead of taking on extra corporate risk, many market participants are moving their capital into safer assets.

Asian Credit Markets Feel the Strain

The pressure spread across Asian markets on Friday, impacting both corporate bonds and stocks. Spreads on higher-rated Asian dollar bonds expanded to their widest point since last July.

Traders reported that regional credit-default swaps (CDS) widened by roughly 1.5 basis points to reach 78 at Friday's market open.

Credit-default swaps function like insurance policies against corporate default. When CDS prices go up, it indicates that investors see greater risk in holding that debt.

Chinese corporate bonds experienced some of the sharpest moves across the region:

• Chinese technology bond spreads widened by 3 to 5 basis points.
• China's overall investment-grade bond spreads widened by up to 5 basis points.
• Indian investment-grade and South Korean bond spreads widened by up to 3 basis points.

Stock Markets Fall While Safe-Haven Assets Rally

Asian stock indexes came under heavy selling pressure on Friday as bond yields climbed:

• Japan's Nikkei 225 dropped 1.72% from its previous close to hit 61,825.26 by late morning in Tokyo.
• South Korea's KOSPI posted a larger decline, falling 1.97% to 5,424.96 by late morning in Seoul.
• China's CSI 300 slipped 0.70% to 4,008.12 in morning trading.

Earlier in the session, China's CSI 300 touched 3,958.14, setting a new 52-week low. That low arrived just one day after the index formally entered a bear market following 10 consecutive weeks of declines.

Looking for safety, investors turned toward US government debt. US Treasuries rallied across all maturities, marking their best single day in over two years. Traders also bought Treasury futures to cover short positions and unwind bearish wagers.

Why AI Debt Is Raising Red Flags

Much of the anxiety in both stock and bond markets ties back to how technology firms are financing their massive AI initiatives.

A Bloomberg report pointed out that investors fear heavy debt spending on AI might not produce strong profits quickly enough to cover borrowing costs.

Back in July, a Bloomberg Macro View analysis highlighted that AI-related bond issuance was speeding up. It warned that intense competition for capital would drive up yields and widen credit spreads.

When credit spreads widen, it makes new borrowing more expensive for companies building out essential AI infrastructure.

Any AI bubble risk lies in debt.

Jurrien Timmer from Fidelity emphasized this point, noting that bond yields for AI cloud firm CoreWeave had climbed above 15% during that period.

Comparing Today to the 2025 Tariff Shock

The last time bond spreads reached this level was following a major trade disruption in mid-2025.

After the US announced broad import duties on April 2, 2025, credit spreads widened dramatically. According to S&P Global, US investment-grade spreads rose from 82 to 102 basis points by April 7.

When a 90-day tariff pause was announced on April 9, market stress eased, bringing spreads down to 89 basis points by April 28. However, spreads remained above the 60 to 70 basis-point range seen in late 2024 and early 2025.

Katie Stockton of Fairlead Strategies noted that widening credit spreads are a key indicator that can signal further stock selloffs. Friday's market data shows that this indicator has turned active once more.

Market Leaders Argue Both Sides of the AI Question

Prominent financial figures remain divided on whether current market concerns about AI debt are justified:

• Ken Griffin (Citadel): Cautioned that the AI sector is almost certainly experiencing a market bubble.
• Jon Gray (Blackstone President): Described underlying demand for AI technology as "nearly parabolic."
• Tom Lee (BitMine Chairman): Suggested that falling interest rates and crowded short positions could mean the AI tech selloff is nearing its end, though broader market conditions remain subject to earnings performance.

What Happens Next?

In 2025, a temporary pause in global tariffs gave bond markets a clear catalyst to recover.

This time, any sustained market recovery will likely depend on whether heavy corporate investments in AI begin delivering clear financial returns.