Does the spread change when the underlying loan has an ARM in it

The seller eats it unless the wrap note is written with a floating rate tied to the underlying. I've seen notes drafted where the buyer's payment adjusts dollar-for-dollar with the underlying, but that's a hard sell to a buyer who thinks they're getting a fixed rate and usually kills the deal. Most wraps I've seen on ARMs just priced the spread fat enough at origination, like $600-700 a month instead of $400, specifically to absorb a couple of resets before the balloon forces a refi anyway.

What does the wrap note say about rate risk, specifically whether there is a pass-through clause tied to the same index and caps the underlying ARM rider uses?

Because I've read wrap notes drafted both ways and the difference is everything. The ones with proper pass-through language peg the buyer's payment to the same index movement, with a spread floor written in, usually $150 to $200 minimum in the deals I've seen, so the seller isn't quietly subsidizing the buyer starting in month 37 with no remedy.

Honestly the framing of "does the seller eat it" is the wrong starting point. I wouldn't write a fixed buyer-side payment on a wrap with an ARM underneath, period. Index it to SOFR or whatever the underlying is pegged to, cap the buyer's adjustment at say 1.5% per year, and you've got a note that actually mirrors the risk instead of hiding it.

The deals where sellers "just hope" are the ones blowing up in year three when a 6.5% underlying resets to 8.1% and the spread is gone before the morning coffee. I've seen wholesale assignments fall apart at the last second because nobody surfaced that clause until title ran the existing mortgage docs.

Wrote a wrap in Atlanta 2021, underlying was a 5/1 ARM, spread looked fat at closing.

Month 61 the rate jumped and my net went from $340 to $80.

No language in the note tied the buyer's payment to index movement, that was the mistake.

Cost me fourteen months of compressed cash flow before the buyer refinanced out.

Did one co-GP deal in 2022 where the operator wrapped an ARM-backed property in Phoenix and the note had zero language about rate movement. By month 28 the underlying reset and the spread compressed from about $510 to roughly $190, and the operator was calling LPs asking for patience because the cashflow model was just gone. Nobody went back to the buyer, nobody could, the note was fixed and signed and that was the end of that conversation. Cost me about $4,800 when the deal restructured and I got bought out at a haircut rather than wait for a payoff that kept sliding.

The language I have seen since, on exactly one deal I reviewed but did not enter, tied the buyer's payment to SOFR movement above a floor, with a cap on how much it could move per adjustment period, basically mirroring the structure of the underlying ARM back into the wrap note. The attorney who drafted it described it as a pass-through provision with a consumer-protection ceiling. Whether that holds up in a dispute I genuinely do not know, but at least the seller is not silently eating compression while the buyer's fixed payment looks clean on paper. The problem is most sellers in a wrap situation are not walking in with that kind of counsel, they are walking in motivated and hoping the ARM stays flat, which is exactly the wrong posture when you are in year one of a 5/1 that has nowhere to go but up.

The premise I'd push back on is that this is primarily a drafting problem. Drafting helps, but the real mistake is writing a fixed wrap over an ARM at all if the spread is thin. I had a bridge fund position where the operator did exactly this on a small portfolio in Memphis, 2022 vintage, underlying loans were 5/1 ARMs and the wrap notes were fixed to the buyers. The deck projected a $340 average monthly spread across six doors. By the time two of those ARMs hit their first adjustment caps the spread on those units was under $80, and the operator had no recourse because the wrap notes had no float-through language. He just absorbed it. The fund took the hit on cash distributions for two quarters. That K-1 situation I deal with where the numbers never match the deck, this is exactly the kind of thing that causes it.

If I were structuring this I would not write a fixed wrap over an ARM period. I would either wait until the seller refinanced into a fixed before wrapping, or I would build explicit float-through language that ties the buyer's payment to a defined index plus a floor spread, something like SOFR plus 200 basis points with a minimum spread of $300 to the seller regardless of movement. That language is uncomfortable to sell a buyer on but it is the only version that does not slowly destroy the seller's economics. What I actually want to know is how far out the first ARM reset is relative to the expected wrap payoff date, because if the buyer is likely to refi or sell before month 37 anyway the whole risk calculus shifts.

The note language is where everybody gets lazy and it shows up in year three as a phone call nobody wanted. Wrap note I reviewed out of Columbus last year had a rider that tied the buyer's monthly payment to the underlying index plus a fixed margin, capped at 200 bps of movement per adjustment period. So if the seller's SOFR-based ARM popped, the buyer's obligation floated inside that cap and the seller's spread compression was bounded, not open-ended. That is the only structure I have seen actually work. Every deal where the buyer's payment was hard-fixed and the underlying was ARM-based, the seller ends up absorbing whatever the Fed decided to do that quarter. I had one Akron-area note holder describe it to me as "I sold a fixed annuity and bought a variable expense." That's what it is.

The thing I have never seen work is the "we'll handle it if it happens" handshake. What happens instead is the ARM resets, the seller waits two months hoping it corrects, it doesn't, they call an attorney, the attorney tells them the note controls, and now they're either taking $120 a month on a deal they structured for $400 or they're trying to manufacture a default event to get out. Neither is clean. So the real question I'd ask before closing any wrap on an ARM underlying is: what index, what margin, what caps, and what is the realistic worst-case payment in month 49. If you can't model that in ten minutes on a spreadsheet, the note isn't written well enough to close.

A floating-floor clause in the wrap note solves this directly.

The buyer's payment resets by the same dollar amount the underlying ARM moves, capped by whatever ceiling the parties negotiate at closing, so the seller's spread survives the adjustment without a renegotiation.

What rate ceiling did the seller's ARM disclose at origination?

Most wraps I've seen written on ARMs just hope the cap holds.

What I'd want to know before anything else: what's the periodic cap on the underlying, because 2/2/5 and 1/1/5 are very different problems by year four.

The cleanest structural fix is a pass-through clause: the wrap note explicitly states that the buyer's payment adjusts by the same dollar amount as any change in the underlying's required payment, with 30 or 60 days written notice and a cap on how much can pass through in any single adjustment period. That way the seller's spread is contractually protected without requiring renegotiation, because the adjustment mechanism was already agreed to at signing.

The checklist a careful operator runs before closing a wrap over an ARM: pull the note on the underlying and find the index, the margin, the periodic cap, and the lifetime cap, then model the worst-case payment at the cap to see whether the buyer can plausibly cover it; confirm the due-on-sale clause language and whether the lender has historically enforced it on wraps in that state; verify the wrap note addresses what happens if the underlying resets and the buyer's payment cannot cover the new PITIA, specifically whether that triggers a cure period or immediate default under the wrap; check whether the servicing company handling the wrap will handle variable disbursements to the underlying lender or requires a fixed sweep.

The assumption doing the most work in most of these deals is that the ARM won't move meaningfully before the buyer refinances out, and that assumption is load-bearing enough that it belongs in writing as an outside date, not just as shared optimism at closing. What index is the underlying tied to, and do you know the periodic cap structure?

Closed my first wrap as a buyer last fall, not as the escrow side, so I was reading everything in that note like my rent depended on it, because it did. The seller's attorney put in a clause that tied my monthly payment to a floor, not a ceiling, meaning if the underlying ARM dropped my payment stayed fixed but if it jumped more than 150 basis points above the start rate in any reset period my payment could be adjusted upward by the same dollar amount, capped at $175 per reset. Not elegant. But it was something. What I have seen more often, talking to other buyers in my situation, is nothing. No language at all. The seller priced in the spread they wanted on day one and the wrap note reads like the underlying is a 30-year fixed even when it is a 5/1. That is a real problem because the seller structured their exit around $380 a month in spread and by year six they are looking at $60 and a balloon still four years out.

The question I would ask before anything else in your scenario: what is the cap structure on the underlying ARM? A 2/2/5 with a 3.25 start rate behaves very differently than a 5/2/5 on a 4.75. If the per-period cap is 2% and the lifetime cap is 5%, you can actually model the worst-case compression at signing and decide whether the deal pencils even in the worst reset sequence. Sellers who skip that math are hoping, not underwriting. And hoping is how you end up with a wrap where the spread inverts if the index runs hot two resets in a row and you have zero contractual ground to go back to your buyer.

Confirm whether the underlying ARM has a periodic cap and a lifetime cap before anything else.

Those two numbers bound the worst case for the seller's spread compression, and without them the wrap note language is being written against an unknown range. A 2/2/5 cap structure on a 6 percent starting rate means the buyer-facing rate needs to clear 11 percent at the ceiling to still leave the seller anything, and if the wrap note fixed the buyer at 8 percent, the seller is already underwater in that scenario before year six. The float-through clause people draft typically ties buyer payment increases to the index plus margin that governs the underlying, with a floor at the original buyer rate and movement capped at whatever the underlying's periodic cap allows, so the buyer absorbs index movement proportionally rather than the seller absorbing all of it. That clause creates a variable-rate obligation for the buyer, which changes the deal's character and the seller's disclosure exposure, so a real estate attorney needs to draft or review it rather than borrowing language from a fixed-rate wrap template. The other structure is a spread reserve held in escrow at closing, sized to cover the maximum periodic adjustment for a defined number of resets, which protects the seller without making the buyer's payment variable but requires agreement on who holds it and what triggers a draw. What is the index on the underlying, because SOFR-based and older LIBOR-transitioned instruments sometimes have different adjustment timing than the note's reset schedule implies?

What ARM index is it tied to, SOFR or something else?

@wraparound_escrow the line that got me was "everybody just hope the ARM doesn't move much and close anyway," because yeah, that is exactly what happens, and I am watching it play out right now on a subject-to I am evaluating where the underlying is a 5/1 ARM already in year three. The attorney I am working with flagged that the wrap note as written has a fixed buyer payment with zero pass-through language, meaning if that loan resets hard in month 25, the seller, who in a sub-to situation is still me, the person who bought subject-to, absorbs every dollar of compression. On the deal I am looking at the spread is about $340 and the worst-case reset could eat $210 of it, which is not catastrophic but it is also not the deal I underwrote. What I have not seen anyone answer yet is whether you can draft a floor clause that ties the buyer's minimum payment to the underlying index plus a fixed margin, because that would at least preserve the seller's position mechanically, but I have no idea how enforceable that is when the buyer signed a fixed-rate note at closing and then you are telling them their payment is moving. What state are you closing these in, because that feels like it changes a lot here?

The cleanest protection I have seen documented is a pass-through adjustment clause that ties the buyer's payment to movement in the underlying index, usually SOFR or whatever the original ARM uses, with a defined cap on how much the buyer's rate can move in any single adjustment period to mirror the underlying note's own periodic cap. That way the spread stays roughly fixed rather than the seller holding a basis risk position they never priced.

The thing worth adding to what's above: if the underlying ARM has a lifetime cap, the seller's maximum exposure is actually calculable at closing. Say the underlying is a 5/1 ARM at 6 percent with a 5 percent lifetime cap, so worst case the underlying payment on a 300k balance rises by roughly 800 a month over the life of adjustments. A seller who knows that figure can either price the wrap spread wide enough to absorb it, or write the pass-through clause with a floor that keeps them whole. What usually goes wrong is that nobody runs the lifetime cap scenario at the table, they run the current payment and call it a day.

Does the underlying ARM in this deal have a periodic cap and a lifetime cap stated in the note, and did anyone model the spread at the worst-case ceiling?

Most people writing wraps just pick a fixed buyer payment and move on, which is exactly backwards when the underlying is adjustable. What I would do instead is tie the buyer's payment to the underlying index plus a fixed spread, same logic as a HELOC, so if the seller's SOFR-linked ARM moves 180 basis points in month 37, the buyer's obligation moves with it and the seller's margin stays intact. You have to define that in the note at closing, not after the reset hits. I watched a Macomb County deal fall apart in early 2023 because the seller had a 5/1 ARM that reset in month 14 of a 30-year wrap, payment jumped roughly $310, and the note said nothing about it. Seller tried to renegotiate. Buyer said the note is the note. It went sideways from there.

What I keep wondering about this whole thread is whether anyone is actually pricing the adjustment cap into their initial spread. If the underlying ARM has a 2/2/5 cap structure, your worst-case lifetime move is known at closing. You can model it. A $400 starting spread on a loan with a 5-point lifetime cap is not $400 of real margin, it's potentially negative territory by year eight, and if nobody ran that math before signing, the seller made a bad deal on paper the day they closed it. What ARM product is on the underlying loan you are asking about, and what are the caps?

The misconception worth naming first: most people treat the wrap rate as the thing that sets the spread, when the spread is actually a residual, set by the relationship between two payments, and if one of those payments is variable, the spread is variable whether the note says so or not.

The two ways to draft around this are a pass-through clause and a floor-with-cap structure, and they solve different problems. A pass-through clause ties the buyer's wrap payment directly to movement in the underlying index, typically with a defined lag, say 30 or 60 days after the servicer confirms the new underlying payment, so the buyer's obligation rises in step and the seller's spread holds. The problem is that a buyer who signed a fixed-rate wrap note at closing did not agree to a variable payment, and if the pass-through language was not in the note they signed, you have a contract dispute rather than a clean adjustment mechanism. The floor-with-cap structure works differently: the wrap note stays fixed for the buyer, but the seller negotiates the wrap rate high enough that even a two or three point ARM adjustment leaves the spread positive, which means the seller is pricing ARM risk into the buyer's rate at origination rather than trying to recover it later. A $400 spread on day one that is really absorbing a potential $280 swing is a $120 spread with a lot of optimism attached. If the underlying ARM has a lifetime cap, that cap is the number the seller should be modeling against when setting the wrap rate, not the start rate, because that is the worst case the seller has to survive until the wrap pays off or the buyer refinances out. What is the reset schedule on the underlying, specifically whether it is a 5/1 or something shorter, because that changes how much of the seller's holding period sits inside the fixed window?

The assumption doing the most work here is that the buyer's payment is fixed by the note as written, full stop. Some wrap notes are drafted with a passthrough clause that ties the buyer's payment to the underlying index plus a fixed margin, which converts the buyer's obligation from a stated dollar amount to a formula, and that language has to survive a due-on-sale challenge in whatever state you're operating.

The cleaner structure I've seen described is a floor-and-ceiling rider: the buyer's rate cannot drop below the wrap rate at origination, but it floats up with the underlying if the underlying ARM adjusts past a defined trigger. That protects the seller's spread without leaving the buyer exposed to uncapped movement, because you pair it with a lifetime cap that mirrors or slightly tightens the underlying loan's own cap structure.

Without that language, yes, the seller absorbs the compression, and if the ARM moves hard in year three on a deal underwritten at a $400 spread, the seller may be collecting less than their own PITI obligation before considering maintenance or vacancy on the property they no longer occupy. What index is the underlying ARM tied to, SOFR or something legacy, and do you know whether the existing note has a periodic cap that limits any single reset?