China's Stock Market Was Supposed to Keep Crushing It in 2026. Instead, It Just... Stopped — And Today Even Wall Street Felt It.

Three months ago I would've told you Chinese stocks were the trade of the decade. Today I'd tell you to check the charts before you say that about anything 😅

I got caught up in the hype earlier this year. After watching Chinese equities post one of their best years in over a decade back in 2025, I figured 2026 would just be more of the same. It wasn't. And today made it clear this isn't just a China story anymore.

What actually happened

The Shanghai Composite is sitting near a one-year low today, around 3,823, after another 1.7% drop. The Hang Seng has held up a bit better, hovering around 24,600, but that's still well off its summer peak above 28,000. Broader China funds like MCHI are down roughly 9% for the year.

Meanwhile, the S&P 500 is still up somewhere around 12% year-to-date, even after giving back some ground today, dropping about 0.8% to 7,683 as Treasury yields spiked.

Why the reversal

Part of it is just gravity after a 30%+ year in 2025. But right now, it's bigger than that. The 10-year Treasury yield just hit its highest level since 2007, and that matters more than it sounds like it should: when a "safe" government bond starts paying that well, money that was sitting in riskier stocks starts flowing back into bonds instead, pulling prices down on both sides of the Pacific. On top of that, US lawmakers are moving to restrict Chinese-made components in AI data centers, and this week's Trump-Xi summit only produced a truce extension, nothing more. Chinese tech investors who'd piled in on AI optimism have been taking profits instead of adding more.

The part that still nags at me

Chinese tech stocks are still trading at a steep discount to their US peers, even as Chinese AI models keep closing the performance gap with American ones. The underlying story didn't fall apart — the market got ahead of itself in 2025, and 2026 has been about working that off. Whether this settles into a new base or keeps grinding lower is genuinely unclear, especially with bond yields now squeezing both sides of the Pacific.

Bottom line

China went from "hottest trade of the year" to "please hold" faster than I finish my coffee in the morning 😁. The US has held up better this year, but even Wall Street isn't immune to what rising yields are doing right now.