Been digging into some undervalued reits lately and honestly, the passive income angle is pretty solid if you know where to look. These things have been catching my attention more since they're interest-rate sensitive, meaning there's potential upside if rate cuts actually happen.

Let me break down what I've been looking at. Realty Income is the classic pick everyone knows - it's basically the monthly dividend machine. Trading at reasonable valuations, it was yielding around 5.57% with consistent monthly payouts. That's the kind of steady income stream that just keeps working while you sleep.

But here's where it gets interesting. Agree Realty has been quietly rebounding. The omni-channel retail angle is solid and they just bumped their monthly dividend up 12% month-over-month, which is a strong signal. Their FFO beat expectations and revenue growth was up 18% year-over-year. With over 2,100 properties across 49 states and a fortress balance sheet with no major debt maturities until 2028, they've got real staying power. That's the kind of undervalued reits setup I actually want to own.

Then there's Iron Mountain, which is playing the AI infrastructure game hard. They're aggressively expanding data center capacity to handle all the generative AI demand. That thesis is compelling - as data center investments are expected to jump from $321 billion to $410 billion by 2025, these kinds of plays should benefit significantly. Their earnings were solid with FFO beating by 18 cents and revenue up 12% year-over-year. Analysts were raising price targets too, which usually means institutional money is getting interested.

If you want diversification instead of picking individual undervalued reits, the Data Center & Digital Infrastructure ETF gives you exposure to the whole ecosystem - Equinix, American Tower, Crown Castle, Digital Realty Trust, Digital Bridge. One fund, 25 related holdings, and you're not betting everything on a single property.

The macro setup for these kinds of investments is interesting right now. If the Fed does cut rates like everyone's expecting, money flows back into yield-generating assets. That's when undervalued reits typically have their moment. Worth keeping on your radar if you're looking to build passive income without getting too aggressive on growth.