Securitized products Report Interpretation

Overview

Citi's securitized-products roundtable reviews Agency MBS, aircraft ABS, residential transition loans (RTL), data-center CMBS and European CLOs. Its conclusions are differentiated: Agency MBS valuations are broadly fair-to-tight, aircraft ABS and RTL offer selected relative value, while data-center policy uncertainty and EUR CLO credit deterioration warrant close attention.

Core views

Agency MBS spreads tightened after Federal-related rate volatility steepened the curve and raised volatility. Citi puts production-coupon OAS at 29bp, the upper end of its 20-30bp fair-value range. Lower coupons outperformed, with 2.0s-3.5s tightening by 7-11 ticks week on week, compared with only 2-3 ticks for 6.0s-7.0s. Despite broad tightening, Citi considers 5.5s-7.0s cheap and 3.0s and 4.0s rich on an OAS basis. The report also notes that GSE buying has slowed: average monthly net purchases were $7bn in 1H26 versus $15bn in 2H25, coinciding with tighter spreads this year. Fannie and Freddie added $44.6bn of Agency MBS and shed $2.6bn of loans in 1H26; their retained portfolio stood at $337bn, leaving $113bn under the PSPA cap. Both duration gaps reached about 1.3 years in June, increasing portfolio market-value sensitivity to a 50bp rate shock. Citi sees aircraft ABS spreads as attractive across the capital structure. Commercial aircraft lease ABS single-A seniors trade in the mid-100bp area over Treasuries, wider than comparable subprime auto ABS at about 95bp and roughly flat to fiber ABS; BBB class B spreads are in the mid-200bp area, wider than comparable subprime auto and fiber ABS. Aircraft loan ABS senior bonds, generally AAA or AA rated, trade around the low-100bp area, similar to corporate AAA CLOs. Issuance has recovered sharply: 18 YTD deals totaling $12bn have priced, including $9bn of lease ABS, $2.5bn of loan ABS and $0.7bn of business-jet deals, surpassing the 2019 record full-year total. The outstanding market is about $33bn across 42 shelves. The report argues that post-pandemic aircraft lease ABS have become more senior-friendly. Recent vintages contain more narrowbody aircraft, younger assets, and remaining lease terms mainly of five to nine years, reducing re-leasing risk relative to pre-pandemic transactions. Public Class C offerings are absent from 2026-vintage deals, and the stated waterfall pays Class A interest and scheduled principal before Class B interest and scheduled principal. Citi evaluates aircraft securitizations as operating businesses rather than LTV-based lenders; roughly two-thirds of the reviewed deals had leverage below 5x and DSCR above 1x. Risks remain in older deals: a dozen pre-pandemic lease ABS missed ARDs largely for credit reasons, and NAVTR 2021-1 Class B and C have recently been locked out because of aircraft dispositions. RTL issuance was $2.7bn across 12 deals and 11 unique shelves in 2026 YTD, broadly in line with $3bn over the same period in 2025. Citi links continuing demand to high home prices and homeowners choosing renovations rather than moving in a high-rate environment. Although gross flipping profit and ROI have compressed from 2021-22 peaks under elevated costs and financing rates, remodeler sentiment remains expansionary. Citi's relative-value case is that RTL single-A seniors offer spreads similar to non-QM single-As while carrying 10-14% more credit enhancement and lower extension risk. It cites overcollateralization and excess spread as structural protection against higher defaults, but identifies structural complexity, collateral drift and limited secondary liquidity as drawbacks. RTL call behavior supports Citi's expectation of early retirement for many eligible deals. Of 38 deals issued in 2023-24, 10 paid off before the call date and 10 were called on or shortly after it; only two eligible deals remained outstanding, while 16 had not yet reached eligibility. A further seven deals totaling $1.6bn become call-eligible by year-end and 27 deals of about $7bn in 2027. Coupon step-ups one month after eligibility reinforce the expectation that most will be retired by or soon after their call dates. Delinquencies remain contained, with 2025 and 2026 rated and unrated vintages below 2024 levels, though repurchase activity at some shelves partly suppresses headline rates. Rated RTL deals show 50%-70% VPR, versus 40%-60% for unrated deals; Citi attributes the weaker unrated profile partly to less experienced borrowers, more complex collateral and greater extension tolerance. Housing-price appreciation remained positive at low-single-digit rates in May, supporting borrower equity, but results are regionalized, with the Northeast and Midwest outperforming and several Sun Belt metros weaker. For data-center CMBS, Citi observes that spreads have held for now, supported by a more manageable supply pipeline than corporate credit, but the next CMBS pricing will test whether corporate issuance-driven widening spills over. A July 24 fixed-rate Compass Datacenters transaction priced AAA, AA and A tranches at I+135bp, I+170bp and I+195bp. Corporate markets had absorbed $62bn of data-center-related IG and HY issuance YTD, versus roughly $35bn for all of 2025, while 2026 CMBS data-center issuance was only $6.2bn across five deals; Citi expects $10bn-$12bn for the full year. Proposed construction moratoriums could extend the CMBS supply outlook. They may create scarcity value and pricing power for high-quality stabilized SASB properties, but a hostile regulatory environment could impair refinancing prospects by prompting higher lending rates, lower LTVs and higher DSCR requirements. Community backlash is tied to data centers' approximately 4.4% share of US electricity use, projected as high as 15.3% by 2030, or 800-1,050 TWh; the report states that $18bn of projects have been blocked and $46bn delayed since mid-2024. In EUR CLOs, Citi maintains its €70bn new-issue forecast. New issue supply was €33bn YTD, flat year on year, while reset supply of €24bn was up 16% and refi supply of €8.2bn rose from €1.2bn a year earlier. Citi raises its combined refi/reset forecast from €40bn to €55bn, comprising €40bn of resets and €15bn of refinancings, based on 1H26 issuance and BB MVOC for deals exiting non-call; deals above 107 are considered more likely to reset and those below more likely to refinance. The market faces high portfolio overlap, averaging 55% among EUR CLO managers versus 40% in the US. Performance indicators are weak: median reported equity cash flow was 2.6% for a second consecutive quarter, YTD equity returns were -11%, and more deals were failing cash-diversion tests as junior OC cushions trended lower and zero-equity-cash-flow deals increased. S&P CCC-limit breaches rose to 12.8% from 5.8% in April, median S&P CCC exposure rose 0.6 percentage points to 4.4%, and the median junior OC cushion was flat at 4.0%.

Analysis framework

Citi assesses relative value by comparing spreads, ratings, structural protection, issuance, collateral composition and performance across securitized-product subsectors. It combines market pricing and supply data with portfolio metrics such as OAS, duration gaps, leverage, DSCR, credit enhancement, prepayment behavior, CCC exposure and overcollateralization cushions.

Methodology notes

• Fixed Income and CreditSpread analysis

  Spread and OAS comparison

  The report compares tranche spreads and option-adjusted spreads across Agency MBS, aircraft ABS, RTL, non-QM, CLOs and corporate credit to identify relative value and possible spillover.

• Fixed Income and CreditSpread and Asset-Quality Analysis

  Structural and collateral credit analysis

  Citi evaluates leverage, DSCR, LTV, credit enhancement, OC cushions, CCC limits, delinquency and cash-diversion tests to assess the protection available to securitization tranches.

• Industry AnalysisSupply-demand framework

  Issuance and supply-demand analysis

  The report relates new issuance, GSE buying, construction restrictions and corporate funding supply to spreads, scarcity and refinancing conditions.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Agency MBS

  Citi finds high-coupon 5.5s-7.0s relatively cheap and 3.0s-4.0s relatively rich on an OAS basis.

  Strengths

  GSE retained-portfolio capacity remains $113bn below the PSPA cap.

  Weaknesses

  Production-coupon OAS is at the high end of Citi's fair-value range.

  Comparison

  Lower coupons outperformed higher coupons during the week.

  Risks

  Higher duration gaps increase sensitivity to a 50bp rate shock.

• Commercial aircraft lease ABS

  Citi views spreads as attractive across the capital structure.

  Strengths

  Newer, more narrowbody collateral; longer remaining leases; senior-friendly payment waterfalls.

  Weaknesses

  Older pre-pandemic deals have experienced ARD misses.

  Comparison

  Single-A and BBB spreads are wider than comparable subprime auto ABS; BBB is also wider than fiber ABS.

  Risks

  Credit issues, aircraft dispositions and ARD-related stress in older transactions.

• RTL ABS

  Citi identifies relative value in single-A rated seniors versus non-QM.

  Strengths

  10-14% higher credit enhancement, overcollateralization, excess spread and lower extension risk.

  Weaknesses

  Structural complexity, collateral drift and limited secondary liquidity.

  Comparison

  Similar spreads to non-QM single-As.

  Risks

  Higher defaults, regional housing weakness and reported delinquency suppression from repurchase activity.

• Data center CMBS

  Existing high-quality SASB properties may gain scarcity value if development is constrained.

  Strengths

  Limited CMBS supply relative to corporate data-center debt issuance.

  Weaknesses

  No CMBS deal had priced since July 1 at the time of the report.

  Comparison

  CMBS spreads had held more steadily than wider corporate IG and HY levels.

  Risks

  Moratoriums may raise financing costs, reduce LTVs and require higher DSCRs.

• EUR CLO equity

  Citi reports weak current performance and worsening tail-risk measures.

  Strengths

  Longer-term median equity IRR is 12% when realized cash flows and current-NAV liquidation are combined.

  Weaknesses

  Low quarterly cash flows and rising zero-cash-flow deals.

  Comparison

  YTD equity return is -11% versus -15% in the US.

  Risks

  More CCC-limit breaches, declining junior OC cushions and cash-diversion test failures.

Key data

• Production-coupon Agency MBS OAS29bpAt the high end of Citi's 20-30bp fair-value range.
• GSE Agency MBS purchases$44.6bnAdded in 1H26 while $2.6bn of loans were shed.
• Aircraft ABS YTD issuance18 deals totaling $12bnAlready above 2019's record full-year issuance.
• RTL issuance$2.7bn across 12 deals2026 YTD, in line with $3bn in the comparable 2025 period.
• Data-center CMBS issuance$6.2bnAcross five 2026 deals; Citi expects $10bn-$12bn for the full year.
• EUR CLO new-issue forecast€70bnMaintained by Citi.
• EUR CLO refi/reset forecast€55bnRaised from €40bn; €40bn resets and €15bn refinancings.
• EUR CLO equity return-11%Year to date, versus -15% in the US.
• S&P CCC-limit breaches12.8% of dealsUp from 5.8% in April.

Impact & implications

The report presents a selective fixed-income landscape: aircraft ABS and RTL structures appear relatively attractive on Citi's spread and structural comparisons, whereas Agency MBS are near the tight end of its fair-value range. Data-center CMBS may benefit from limited new supply but faces regulatory and refinancing uncertainty, while EUR CLO credit metrics point to growing tail risk despite continued issuance activity.

Risks

• Agency MBS portfolio duration gaps have risen to about 1.3 years, increasing sensitivity to a 50bp rate shock.
• Aircraft ABS pre-pandemic transactions face credit-related ARD misses, and certain classes may be locked out after aircraft dispositions.
• RTL structures face collateral drift, complexity and limited secondary-market liquidity; delinquency data may be flattered by repurchases.
• Data-center moratoriums and restrictive zoning could weaken refinancing conditions through higher rates, lower LTVs and higher DSCR requirements.
• EUR CLO tail risks are rising as CCC-limit breaches increase, junior OC cushions weaken and more deals fail cash-diversion tests.

What to watch

• Whether the next CMBS transaction reflects spillover from corporate data-center issuance-driven spread widening.
• The pace of proposed and enacted data-center moratoriums, zoning restrictions and tax-abatement changes.
• Aircraft ABS ARD outcomes and performance of older transactions.
• RTL call-eligibility activity for seven deals totaling $1.6bn by year-end and about $7bn across 27 deals in 2027.
• EUR CLO issuance, reset/refinancing activity, CCC-limit breaches, OC cushions and equity cash flows.