Been thinking about what could actually tank the stock market this year, and honestly, most people are looking at the wrong culprit.

Everyone wants to blame AI stocks or some recession narrative, but here's what I keep coming back to: inflation. Specifically, what happens if inflation decides to creep back up and bond yields follow it higher.

Look, the market's been on an absolute tear these past three years. It's felt almost untouchable. But valuations are stretched compared to historical norms, and three years of consecutive gains this strong? That's not exactly a common sight. So yeah, the question of will stocks crash isn't crazy—it's actually worth thinking through.

The inflation story is tricky because the Fed thought they had it under control. CPI hit around 2.7% most recently, which is still above their 2% target. Some economists think the real number is even higher when you factor in incomplete data. And here's the kicker—we still don't fully know how Trump's tariffs are flowing through to consumer prices. Walk into a grocery store or look at rent, and most people will tell you prices still feel brutal.

If inflation starts rising again, especially with unemployment also ticking up, you've got a potential stagflation scenario. That puts the Fed in an impossible position. Cut rates and you risk stoking inflation. Raise rates and you risk crushing the job market and economy. It's a genuine bind.

What really matters for markets though is bond yields. The 10-year Treasury is sitting around 4.12%, but we've seen how fragile things get when it pushes toward 4.5% or 5%. Higher yields mean higher borrowing costs for everyone—consumers, businesses, the government. For stocks, higher yields are a direct problem because it raises the bar for what returns investors need to justify buying equities. And many stocks already trade at elevated multiples.

JPMorgan and Bank of America both expect inflation to tick up in 2026 before cooling. JPMorgan sees it hitting above 3% before falling back to 2.4%. Bank of America calls for a peak around 3.1% before settling to 2.8%. If that plays out smoothly, markets probably stabilize. But here's the thing about inflation—once it gets going, it's stubborn. Consumers adjust to high prices, and inflation can become self-reinforcing.

So will stocks crash if we see inflation surge combined with yields spiking? I think that's the scenario that actually has teeth. Not AI implosion, not some sudden recession shock—just the mundane reality of higher inflation and higher borrowing costs becoming incompatible with current valuations.

Don't try to time it. But do pay attention to inflation data and yield moves over the next few months. That's where the real pressure points are.