The Origins and Rebuilding of the CMBS Market

CMBS began when pools of mortgages on troubled properties were sliced so that several buyers could finance the same collateral, and it grew as lenders pulled back from real estate and left a wide gap in commercial lending. The financial crisis cut issuance, pushed spreads up and moved much of what remained into private channels. Rebuilding depended on loan scrutiny by the buyers of the first-loss piece and on settled rules about who holds the risk. The rebuilt market also leans on shorter loans and more floating-rate single-asset deals than before.

Why bank failures and a lending gap produced the first pools

CMBS started as a disposal tool before it became a lending channel. After the savings and loan crisis, the government held loans on properties that had stopped performing. It pooled those mortgages and sliced the pool so that more than one buyer could provide the financing.

The volume explains the need for a new method. Over a span of about fifteen years, 1,617 failed or failing banks holding $302.6 billion in assets were resolved, and about $230.6 billion of those assets, or 76 percent, were sold. Selling at that scale meant finding buyers for assets of very uneven quality, one pool at a time.

A second problem ran alongside the first. Lenders withdrew from real estate under regulatory pressure and after poor performance, which left a broad gap in commercial mortgage credit. Securitization offered a way to fill that gap with capital from buyers who had never originated a mortgage.

Little banking capital was available for real estate in the early years of the new market, so the pooling idea moved from a cleanup device to a source of new lending.

What slicing a pool changes and what it leaves alone

Slicing changes who bears a loss and leaves the total loss untouched. A mortgage pool throws off principal and interest, and the securities carved from it claim that cash flow in a stated order. Senior classes are paid first, and junior classes absorb losses first.

The collateral is the same before and after the cut. If the pool loses a given amount of principal, every dollar of that loss lands somewhere in the structure, and the allocation rule decides where.

Outcomes are therefore uneven. A pool can lose principal while a senior class is repaid in full, because a junior class absorbed the shortfall. A modest pool loss can also wipe out most of a thin junior class.

Pool-level performance data cannot describe the exposure of any single class. A class is measured by its position in the payment order and by the size of the classes beneath it.

The same logic let buyers with different appetites finance one property. A buyer who wants predictable principal takes the senior slice, and a buyer who accepts volatility for higher yield takes the bottom. The worked example below puts numbers on that split.

How the crisis shut issuance and repriced the risk

The crisis hit volume and price at the same time, and the two series need separate reading. Issuance of both residential and commercial mortgage securities fell sharply once the crisis began, and the deals that did come moved from public offerings to Rule 144A and private placements.

Spreads, which measure the yield investors demand over a reference rate, rose sharply over two years of the crisis. They then partially declined but stayed wide afterward, a pattern linked to collateral problems.

In the residential market, the few deals that came to market after the crisis were often backed by seasoned loans and sold in the private channel. Seasoned loans carry a payment history, which gives a buyer something to underwrite that a new origination lacks.

The channel shift changes how a recovery claim is tested. A private placement shows that financing happened for that borrower and that buyer, and it says little about whether public issuance had returned to its earlier scale.

Issuance and spreads can also move apart. Spreads can tighten while volume stays low, and volume can climb while spreads remain wide. Judging recovery takes both series, plus the split between public and private.

Why rebuilding turned on who would hold the first-loss piece

A securitization needs a placement or retention plan for every slice, and the bottom slice is often the hardest to place. After the crisis, uncertainty over regulatory rules and CMBS structures made it difficult to know who would hold loans and how deals could be tranched.

The buyer of the first-loss class, usually called the B-piece buyer, became the gatekeeper for collateral. That buyer takes losses before anyone else, so it reviews loans one at a time and can reject those it will not own.

Among loans shown to one active B-piece buyer by dealers, 8 to 10 percent were rejected in an earlier stretch and 25 to 30 percent in a later one. Both figures describe the loans presented to that buyer and do not measure a marketwide rejection rate.

A rising rejection share changes the pool a dealer can bring to market. Rejected loans either come out of the pool or are replaced, and either choice alters what is being financed and what the senior investors are buying.

Risk retention rules added a second pressure, because someone had to carry a defined share of the risk. The concern voiced in that market was that CMBS could fall to less than 10 percent of the fixed-rate lending market if no workable answer to risk retention emerged. That is an opinion about a rule and carries no forecast weight.

“In the second half of last year, when we were active buying B-pieces, we kicked out between 25 and 30 percent.”

Worked example: how a $100 million pool allocates a $10 million loss and a $30 million loss

This hypothetical example applies the slicing mechanism to principal losses. Both cases start with the same $100 million of mortgage principal, financed by an $80 million senior class and a $20 million junior class. Interest and timing are set aside, and the allocation rule sends losses to the junior class first.

The junior class is $20 million divided by $100 million multiplied by 100, or 20 percent of the pool. That 20 percent is the cushion beneath the senior class.

Base case: the pool loses $10 million of principal. The junior class absorbs all of it, so it keeps $20 million minus $10 million, or $10 million. The senior class is repaid its full $80 million and takes no loss.

The pool loss rate is $10 million divided by $100 million multiplied by 100, or 10 percent. The junior loss rate is $10 million divided by $20 million multiplied by 100, or 50 percent, which is 5 times the pool rate.

Stressed case: the pool loses $30 million of principal. That exceeds the $20 million junior class, so the junior class is wiped out and takes a 100 percent loss, found as $20 million divided by $20 million multiplied by 100. The remaining $30 million minus $20 million, or $10 million, falls on the senior class.

The senior class receives $80 million minus $10 million, or $70 million. Its loss rate is $10 million divided by $80 million multiplied by 100, or 12.5 percent. The pool loss rate is $30 million divided by $100 million multiplied by 100, or 30 percent.

The cases share the same starting principal and the same allocation rule. Security losses reconcile to pool losses in both: in the stressed case the junior $20 million plus the senior $10 million equals the $30 million pool loss. The senior class goes from no loss to a 12.5 percent loss once the pool loss rate passes the 20 percent cushion.

How the rebuilt market shifted toward five-year loans and floating-rate deals

The rebuilt market differs in product as well as volume. Issuance moved from 10-year loans toward 5-year loans, and floating-rate single-asset, single-borrower debt grew as borrowers sought floating-rate debt over fixed. That growth reduced conduit volume.

A single estimate puts the five-year share at about 80 percent of the market, against 10 percent a couple of years earlier. It carries no stated basis, and its direction matches the shift toward shorter terms.

Maturity and rate type are separate features. A shorter maturity brings the repayment date forward, and refinancing risk comes forward with it. A floating-rate changes how the interest cost is set and leaves the repayment date untouched.

Single-asset deals and conduit deals concentrate risk differently. A single-asset, single-borrower deal rests on one property or borrower, while a conduit pools many loans. Counting loans in a pool says little about shared economic exposure.

A before-and-after volume comparison therefore blends two changes: how much was issued and what kind of loans it held. Growth in the total does not show that conduit lending returned on its earlier terms.

Mistakes that distort a CMBS recovery analysis

Treating one closed deal as proof of a restored market confuses an observation with a condition. Issuance shifted toward private placements, so a closing shows that a buyer and a borrower found each other. Public issuance may sit elsewhere, and a sound analysis names the channel before drawing any conclusion.

Reading tighter spreads as evidence that collateral problems have cleared mixes two variables. After the crisis, spreads partially declined yet stayed wide in a way tied to collateral problems. A price improvement describes financing terms and says nothing about the condition of the mortgages.

Applying a first-loss buyer’s rejection share to all mortgage originations changes the denominator. The 8 to 10 percent and 25 to 30 percent figures count loans shown to one buyer. Loans never shown, or sent to other buyers, sit outside the statistic, so it cannot be scaled to the market.

Assuming that subordination lowers the total loss misreads the allocation. In the worked example the 30 percent pool loss is the same with or without slicing. The junior class takes a 100 percent loss and the senior class takes 12.5 percent, and the two sum back to the pool figure.

Comparing aggregate issuance across periods without adjusting for product mix produces a false trend. A rise in floating-rate single-asset volume alongside shorter fixed-rate terms can lower conduit volume even when the total grows. The comparison needs separate lines for conduit and single-asset deals, and again for loan term and rate type.

Questions for reading any account of the CMBS rebuild

Which financing gap does the story describe? Disposing of troubled loans already held and funding fresh originations are different jobs for a securitization.

What does the recovery measure count? Issuance counts securities produced and spreads describe price, so a claim built on one alone leaves the other open.

Which distribution channel carries the numbers? Public offerings and Rule 144A placements reach different buyers, and mixing them overstates or understates the rebuild.

Who holds the first-loss class? The size and owner of that slice set how much pool loss can occur before senior investors are touched.

What population sits behind a rejection percentage? Loans shown to one buyer form a narrower group than all commercial mortgage originations.

How does the final pool differ from the proposed pool? Rejected or replaced loans change the collateral that the senior and junior classes actually rest on.

Does the comparison separate conduit from single-asset deals? A shift toward floating-rate single-asset debt can lower conduit volume while the total looks steady.

When does the repayment date arrive? A five-year loan brings refinancing exposure forward compared with a ten-year loan of the same size.

“Many savvy hedge funds, private equity funds, and investment firms stepped in to fill some of the financing void left by traditional lenders (i.e. banks).”