Public investors are putting a different price on coastal apartments than many buyers in the private market do. A fresh look at the proposed AvalonBay Communities–Equity Residential merger suggests the combined platform trades at implied cap rates in the mid‑6% range, even as private trades for similar coastal multifamily assets continue to clear in the mid‑4% to low‑5% range.
That divergence was unpacked on a recent episode of Trepp's "TreppWire" podcast, where Steven Buschbom, head of applied research and analytics, used the deal to reverse‑engineer what the public market is paying for stabilized NOI across the two portfolios. The resulting six-handle implied cap rates stand in sharp contrast to the sub‑5% yields that still underpin many institutional apartment deals on the coasts.
How The Six Handle Emerged
Buschbom's analysis starts with first‑quarter 2026 results for the two apartment REITs. Taken together, their reported NOI was just over $1.03 billion for the quarter, across roughly 180,000 units. Annualizing that figure, layering in a modest seasonal adjustment for stronger spring and summer leasing, and giving some credit for near‑term development deliveries yields a forward 12‑month NOI estimate around $4.2 billion.
The market's side of the equation is based on the merger's announcement‑day valuation. The deal was framed as an all‑stock merger of equals, with a pro forma enterprise value widely cited at about $69 billion. That figure effectively reflects how public investors were valuing the combined platform at the time the transaction was struck.
The key step was what Buschbom did next. Because the $69 billion enterprise value includes roughly $4.4 billion of construction in progress, representing nearly 11,000 units that are not yet contributing NOI, leaving that balance in the denominator would distort the yield on the operating portfolio. In line with standard REIT cap‑rate work, he excluded construction in progress from the enterprise value to focus on the stabilized income‑producing assets.
With that adjustment, the denominator falls to about $64.6 billion. On that basis, a forward NOI of roughly $4.2 billion implies a cap rate of around 6.6%. Using the unadjusted $69 billion enterprise value produces a yield closer to 6.2%. Splitting the difference and allowing for the full ramp‑up of the development pipeline, Buschbom pegged a reasonable range of 6.3% to 6.6% for what public investors are effectively demanding on the combined coastal multifamily portfolio.
"It lines up with what management is already telling you," he noted, pointing to AvalonBay's disclosure that it had repurchased stock earlier in the year at an implied cap rate in the low‑6% range.
In other words, the six‑handle is not just an academic exercise; it matches the company's own view of where its equity has been trading.
Private Buyers Still Paying Sub‑5 Percent
That six‑plus percent implied yield for core coastal multifamily contrasts sharply with cap rates still being written in many private transactions. On the podcast, Trepp's team pointed out that institutional buyers in the coastal gateway markets have continued to transact in the mid-4% to very low‑5% range on large, well‑located assets.
Those private prints have proven surprisingly sticky. Even with higher‑for‑longer rates and mortgage coupons that often land in the 6%–7% range, pricing has not moved as much as simple spread math might suggest. In some cases, borrowers are effectively accepting negative cash‑on‑cash leverage out of the gate, betting that rent growth and expense normalization will do enough heavy lifting over the hold period to make the deal work.
By contrast, the public market appears to be repricing the risk profile of the same assets. If REIT portfolios that are heavily weighted to coastal Class A multifamily are trading between 6.3% and 6% implied cap rates, public investors are clearly assigning a lower value to each dollar of NOI than many private buyers are assuming in their models. That gap is, at its core, a net‑asset‑value discount.
A Strategic Merger In A Repriced Market
The merger itself is being pitched on familiar strategic themes: greater scale, balance‑sheet flexibility and an estimated $125 million in annual overhead savings. But Buschbom's cap‑rate work underscores another dimension. Both stocks were trading at meaningful discounts to the values implied by private cap‑rate assumptions for similar assets. Combining the platforms is one way to address that disconnect by driving efficiencies and possibly improving public perception of the market over time.
For investors, the deal offers more than a corporate strategy case study. It also provides a clean, real‑time marker for where public capital is willing to transact at scale. In a market where true institutional coastal multifamily trades have become sporadic and private sellers have been slow to capitulate on pricing, that marker may be one of the more useful signals available.
A New Benchmark For Coastal Multifamily
The takeaway from Trepp's analysis is not that coastal apartments are distressed, but that the listed market is no longer treating them as a sub‑5% cap‑rate asset class. A mid‑6% implied yield on portfolios of this size and quality suggests public investors are baking in a more conservative view on growth, expenses and exit pricing than many private buyers.
Whether that pushes private cap rates higher or public REIT valuations climb to close the gap remains an open question. For now, though, the AvalonBay–Equity Residential merger has done more than create an apartment giant. It has given the market a clear benchmark: public investors are quietly pushing coastal multifamily cap rates into the sixes, even as private capital continues to transact as if the fours and fives still hold.
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