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Realty Income (O) Stock Could Be 44% Undervalued Despite Data Center Expansion

Simply Wall St·07/10/2026 18:44:19
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Realty Income’s valuation picture is pulled in two directions, with a Discounted Cash Flow (DCF) intrinsic value estimate pointing to a sizeable gap to the current US$63.17 share price, while earnings based multiples make the stock look relatively expensive and the broader value checks lean cautious.

  • Over the last 3 years, Realty Income has returned 22.5%, which puts recent performance solidly in positive territory and makes the current valuation more important for fresh capital.
  • The planned US$6b joint venture in hyperscale data centers can support expectations for long term cash flows. However, the extra capital and debt funding involved may add sensitivity if those projects do not deliver as planned.
  • On Simply Wall St’s broader checks, Realty Income screens as undervalued in only 2 of 6 valuation tests. This points to a stock that does not screen as a clear bargain overall despite the DCF upside.

The issue now is whether the market price for Realty Income already reflects the benefits of its data center expansion, or if the DCF implied discount of 43.9% still offers a meaningful margin of safety for long term investors.

Find out why Realty Income's 17.1% return over the last year is lagging behind its peers.

Is Realty Income Still Cheap on Cash Flow?

The Discounted Cash Flow (DCF) model for Realty Income is built on adjusted funds from operations and projects the cash the business could return to shareholders over time.

On this view, Realty Income generated last twelve month free cash flow of about $3.89b and the model assumes those cash flows continue growing rather than shrinking. That stream of cash flows is used to arrive at an estimated intrinsic value of about $112.53 per share, compared with the current $63.17 share price, which suggests the stock screens as significantly undervalued on this method.

Because the $6b hyperscale data center joint venture is funded with additional equity and debt, the DCF result suggests the market may be treating that expansion and its execution risks more cautiously than the current cash flow projections imply.

Overall, the Discounted Cash Flow workup indicates that Realty Income stock appears undervalued relative to its current market price on this analysis.

Our Discounted Cash Flow (DCF) analysis suggests Realty Income is undervalued by 43.9%. Track this in your watchlist or portfolio, or discover 44 more high quality undervalued stocks.

O Discounted Cash Flow as at Jul 2026
O Discounted Cash Flow as at Jul 2026

Head to the Valuation section of our Company Report for more details on how we arrive at this Fair Value for Realty Income.

Has Realty Income Run Too Far on Earnings?

The P/E ratio is a useful way to see how much you are paying for each dollar of Realty Income’s earnings. On this measure, Realty Income trades at about 52.6x earnings, which is well above the Retail REITs industry average of roughly 26.5x and also higher than the peer group average of about 28.8x.

The tailored fair P/E for Realty Income, which reflects its size, business mix and risk profile, is estimated at about 37.6x. Compared with the current 52.6x, that is a sizeable premium, suggesting investors are paying a high price relative to what this framework indicates as a balanced level for the stock’s earnings power.

On the P/E test alone, Realty Income stock appears expensive relative to both its industry and its modelled fair multiple.

NYSE:O P/E Ratio as at Jul 2026
NYSE:O P/E Ratio as at Jul 2026

See what the numbers say about this price — find out in our valuation breakdown.

The Realty Income Narrative: What Would Justify Today's Price?

Simply Wall St Narratives for Realty Income pick up where this valuation puzzle leaves off by spelling out which combinations of future growth, margins and earnings would need to occur for the stock to be worth materially more or less than today’s price. Each narrative is set up as a clear, testable thesis about Realty Income’s business rather than a one off snapshot, and sits on Simply Wall St’s Community page so you can see how it holds up over time.

One of the top community narratives on Realty Income: 11% undervalued

"Using the DDM method, it seems the company is undervalued because its current price of 66 dollars is below P20…"

Read one of the top narratives on Realty Income

Do you think there's more to the story for Realty Income? Head over to our Community to see what others are saying!

The Bottom Line

Realty Income sits at a crossroads, with the Discounted Cash Flow (DCF) intrinsic value pointing to a large 43.9% discount while earnings based multiples flag the stock as overvalued. The split largely comes down to how you weigh long term cash flows against what the market is currently willing to pay for its earnings and funding needs. Broader checks remain weak, so the DCF signal is not backed by a wide set of valuation tests. For investors, the central consideration is whether the data center expansion ultimately supports those cash flow assumptions or indicates that today’s discount reflects how the market is pricing execution risk.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.