10-year Treasury yield creeping toward levels we haven't seen since right before 2008 blew up.

That's the kind of thing that makes everything more expensive—mortgages, corporate debt, you name it. Higher rates = tighter financial conditions = stocks start feeling the squeeze.

Worth watching if you're in rate-sensitive sectors like real estate, utilities, or high-growth tech that relies on cheap money. When borrowing costs climb this high, the market usually has something to say about it.