My Last Mistake Started With Beta
I'm a site development manager. I've handled tower leases and network rollout orders for thirteen years, and I've personally made—and documented—27 significant mistakes, totaling roughly $300,000 in wasted budget. The one I still think about happened in 2021: I convinced myself that a carrier with a low stock beta was a safe tenant.
I was wrong.
Beta measures how much a stock moves with the market. That's it. It doesn't tell you whether a company pays its lease invoices. It doesn't tell you whether they'll renew a ground lease, fight a zoning variance, or invest in network upgrades. I spent most of that year watching the wrong number while the real red flags appeared in the carrier's balance sheet and renewal attitude. After that, I created a pre-lease checklist for our team. Revenue trend, lease renewal stats, debt schedule, network investment plans. Beta is not on it.
So when I saw the March 2025 headline—S&P downgrades SBA Communications Corp (SBAC)—I didn't panic. Instead, I thought about how many people were about to make the same mistake I made.
Almost every month, someone searches for SBA Communications beta. I get it. Beta is easy to pull up on any finance site. But if you're using beta to decide whether a wireless infrastructure company is healthy, you're reading the wrong part of the chart.
Beta tells you how a stock moves. It doesn't tell you whether a tower lease gets renewed.
What the S&P Downgrade Is—and Isn't
According to S&P Global Ratings, March 2025, the rating action was about leverage. The company's debt levels, measured against EBITDA, are expected to stay above S&P's previous threshold for a while. That's a balance-sheet statement. It's not a commentary on whether the towers work, whether tenants are leaving, or whether the network is falling apart.
On the morning the rating change crossed the wire, I had about two hours to prepare a note for our field team. Normally I'd wait for the full rating report and a week of quiet analysis. There was no time. I used the public statement, our lease data, and the fact that the network teams were still doing their normal work.
Did the downgrade matter? Yes. It affects borrowing costs and investor sentiment. But it's the difference between a doctor saying 'your blood pressure is high, let's watch it' and saying 'call an ambulance.' One reading doesn't tell you the full story.
The conversation around the downgrade is about how fast debt comes down relative to cash flow. That is a slow process because tower projects have long lead times. Siting, permitting, construction, and carrier installation can take years. Credit rating agencies know this, so they look at multi-year projections, not just one quarter.
One thing the downgrade does not change is the underlying lease structure. Most SBA leases have long terms and annual escalators. Carriers choose tower sites based on coverage needs and radio frequency quality. They do pay attention to financial stability, but the radio signal doesn't care about S&P.
This is also a good place to address N93. When I saw 'N93' next to 'blood pressure' in our search data, I assumed it was a typo. It turns out N93 appears to be a blood-pressure monitor model number. If that's why you're here, I can't help you with the cuff, but the analogy is useful: one blood-pressure reading is not a diagnosis. Neither is a single downgrade.
What Is Networks, Anyway?
Let's answer the question that actually brings people to this site: what is networks? A wireless network is the entire system that moves data between a phone and the internet. It includes macro towers, small cells, fiber, power, spectrum, routers, switches, and the lease agreements that make physical sites possible. One tower is a node. The network is the system.
Think of a macro tower as a streetlight. On its own, it lights a small circle. Connected to a grid, it is part of something much bigger. A wireless network works the same way. One tower covers one sector; many connected sectors keep your call alive as you drive.
SBA Communications is an infrastructure owner. We lease space on towers and rooftops to wireless carriers. We don't operate the mobile network—the carriers do—but every network depends on sites like ours. If a site loses power or a lease expires, users notice.
The radio access network, or RAN, is the part with towers and small cells. Backhaul connects those sites to the core network. SBA's role is to provide the physical space, power, and security that make the radio equipment work. That's why I watch lease renewal dates and site uptime the same way a doctor watches blood pressure trends. One missed renewal, like one high reading, is an early clue. A pattern of missed renewals is the problem.
Beta, Blood Pressure, and the Metric That Actually Matters
If you ask me, the most overused number in wireless infrastructure is beta. I've seen SBA Communications beta move with interest rates, market moods, and headlines. It's a price movement measurement, not a business health measurement.
When I compared two carriers side by side years ago, the one with the lower beta had worse lease renewal behavior. The higher-beta carrier was more responsive in negotiations. That comparison forced me to separate market risk from business risk. The stock moves with the market; the lease payments don't.
For a tower REIT, the number I actually watch is net debt to EBITDA. I won't pretend it's perfect, but it's a more direct measure of how much debt is sitting on top of the cash flow. That is exactly the kind of number a credit rating agency uses. It's slow-moving, a little boring, and far more useful than beta.
I'm not saying beta is worthless. For a short-term trader, beta might help position a portfolio. But for a customer evaluating a long-term infrastructure partner, beta is close to noise. The S&P downgrade is not noise. It is a real signal about leverage. It just needs to be combined with the full picture, the same way blood pressure needs to be taken over time, in different settings, and with the rest of the labs.
The Counterargument I Keep Hearing
To be fair, a downgrade can be an early warning. I've been burned by a tenant whose rating was cut a year before they vacated a site. Ratings deserve a place in your checklist.
The mistake isn't reading the rating. The mistake is reading only the rating and then making a decision. The same applies to beta. The same applies to blood pressure.
Granted, if SBA Communications' cost of capital rises, future builds could slow. That eventually affects network expansion. So the downgrade isn't irrelevant. But a slower build schedule is not the same as a failing network.
There is also the psychological side. A downgrade creates headlines, and headlines create hesitation. I understand that. I've felt the urge to cancel a project because of a bad news cycle. Every time, the patient, second-order analysis saved me from an emotional decision.
Before writing this, I weighed the downside. If I sound too calm, I'm making excuses. If I sound too alarmed, I'm adding to the noise. The expected value is clear: explain the difference between a credit event and a network event.
My Opinion Hasn't Changed
Here's my opinion, stated clearly: the S&P downgrade of SBA Communications Corp (SBAC) is a credit story, not a network story. It deserves a place in your assessment, but it should not replace the details that actually describe the business—lease duration, carrier diversification, site coverage, and balance-sheet leverage.
If a customer asks me whether they should sign a lease with SBA, I don't answer with a rating. I answer with site data, lease terms, and the local coverage gap. The rating lives in the annual report; it doesn't affect the RF path.
I'd rather spend ten minutes explaining those details than watch a customer cancel a site project because of a misunderstood headline. An informed customer asks better questions. That's the whole point of customer education.
So if you came here because you searched 'SBA Communications beta,' I hope you leave with more than a number. If you came because you searched 'N93 blood pressure,' I'm glad the analogy helped. And if you came because you wanted to know what is networks, now you know: it's a system, not a single tower. One credit rating is not the system. It's just one reading.