CLO Glossary

Comprehensive dictionary of CLO, leveraged loan, and structured credit terminology. Navigate by letter or search for specific terms.

A

AAA Tranche
Highest-rated CLO tranche with first claim on cash flows. Typically 60-65% of capital structure. Protected by 35-40% subordination. Zero defaults since 1994. Yields SOFR + 120-150 bps (2024).
Active Management
CLO manager's ability to buy and sell loans during 4-5 year reinvestment period. Distinguishes CLOs from passive securitizations (RMBS). Typical turnover: 25-40% annually.
Amortization Period
Phase after reinvestment period ends (typically years 5-12) when loan prepayments flow through to debt holders rather than being reinvested. CLO deleverages as loans pay down.
Arbitrage CLO
Most common CLO type (99% of market). Manager earns spread between loan yields (SOFR + 450 bps) and debt costs (SOFR + 150-300 bps), with residual flowing to equity. Contrast: Balance Sheet CLO (bank removes loans from balance sheet).
Arranger
Investment bank that structures, markets, and distributes CLO tranches. Top arrangers (2024): JP Morgan, BofA, Citi. Earn 60-100 bps of deal size in underwriting fees.

B

Base Case Default Rate
Expected default rate used in modeling. Typically 3-3.5% annually for leveraged loans (vs. 9.8% peak in 2009). Rating agencies use 31-40% stress scenarios (4-5× base case).
BB Tranche
First non-investment grade tranche. Typically 4-6% of capital structure. Rated BB. Yields SOFR + 500-600 bps. Historical default rate: 2.14% (1994-2024). 45% experienced deferrals in 2008-2009.
BBB Tranche
Lowest investment-grade tranche. Typically 5-7% of capital structure. Yields SOFR + 285-350 bps. Crossover zone (IG rating, HY-like yields). 25% experienced deferrals in 2008-2009, most recovered.
Bid-Ask Spread
Difference between buyer bid and seller ask price. Measure of liquidity. AAA: 10-30 bps. BBB: 75-150 bps. Equity: 300-1500 bps (3-15 points).
Broadly Syndicated Loan (BSL)
Institutional leveraged loan to large borrower ($50M+ EBITDA) distributed across 50-200+ lenders. $1.4T market. Comprises 95% of CLO collateral. Contrast: Middle Market loans (private credit to $10-100M EBITDA companies).

C

Call Protection
Period during which CLO equity cannot call/refinance debt tranches. Typically 2 years non-call, then callable at 101-102 cents. Protects debt holders from reinvestment risk.
CCC Bucket
Maximum percentage of portfolio allowed in CCC-rated loans (distressed credits with 20-30% default risk). Typically limited to 5-7.5%. Tier 1 managers maintain 2-4%; aggressive managers at 6-7.5%.
CLO 2.0
Post-2008 financial crisis generation of CLOs (2009-2019). Features: 5% risk retention requirement, lower CCC limits (5-7.5% vs. 7.5-10%), thicker AAA subordination (37-40% vs. 32-35%).
CLO 3.0
Post-COVID generation (2020-present). Features: SOFR-based (LIBOR replacement), institutional dominance, mezzanine compression (tighter spreads), ESG considerations in 15-20% of deals.
Collateral Manager
Investment manager who selects, monitors, and trades CLO loan portfolio. Most critical player in CLO ecosystem. Tier 1 managers ($15B+ AUM) outperform Tier 4 by 300-500 bps equity IRR.
Coverage Tests
Overcollateralization (OC) and Interest Coverage (IC) tests that trigger cash diversion from junior to senior tranches if portfolio deteriorates. AAA OC test typically requires 127-132% ratio (par collateral / par AAA+AA+A+BBB debt).
Covenant-Lite
Loan structure without maintenance covenants (quarterly financial tests). 95% of BSL market is covenant-lite (2024) vs. 15% in 2007. Delays lender intervention but hasn't increased default rates materially.

D

Default Rate
Percentage of loans that default annually. Historical average: 3.2% (leveraged loans, 1997-2024). Peak: 9.8% (2009 GFC). Current (2024): 1.5-2.0%. Rating agencies model 31-40% stress scenarios.
Diversification Score
Moody's metric measuring portfolio concentration. Higher = more diversified. Typical CLO: 50-70 score (200-300 loans across 20-30 industries, max 2-3% per obligor).
Duration
Measure of interest rate sensitivity. CLOs have near-zero duration (0.1-0.2 years) due to floating-rate structure. High yield bonds: 4-6 years duration. Example: 1% rate increase → -0.1% CLO price, -4.5% HY bond price.

E

Equity Tranche
First-loss, residual tranche receiving cash flows after all debt paid. Typically 8-12% of capital structure. Unrated. Target IRRs: 12-18%. Absorbs 100% of losses until wiped out. 90%+ stopped distributions during 2008-2009.
Event of Default
Trigger that accelerates CLO or gives debt holders control. Examples: Manager bankruptcy, OC test failure > 60 days, fraud. Rarely triggered in practice (well-structured deals avoid technical defaults).

F

First Lien
Secured loan with first claim on borrower assets. 99% of CLO holdings are first lien. Recovery rate: 76% average (1990-2024). Contrast: Second lien (42% recovery), unsecured (25% recovery).
Floating Rate
Interest rate that resets periodically based on reference rate (SOFR). Example: SOFR + 450 bps. Eliminates duration risk. When SOFR rises from 0.05% to 5.35%, loan yield rises from 4.55% to 9.85%.

G-H

Great Financial Crisis (GFC)
2008-2009 recession. Leveraged loan default rate peaked at 9.8% (Q4 2009). Result: Zero AAA CLO defaults, <1% BBB defaults, 10-15% BB principal losses. 2007-2008 vintage equity IRRs: 3-7% vs. 15% targets.
High Yield (HY) Bonds
Fixed-rate corporate bonds rated BB+ or below. $1.3T market. Contrast with leveraged loans: Fixed vs. floating rate, unsecured vs. secured, 4-6 year duration vs. near-zero, 40% recovery vs. 76%.

I

IC Test (Interest Coverage)
Coverage test requiring interest income ≥ X% of interest obligations. Example: IC = (Interest Income) / (Interest Due to AAA+AA+A+BBB). Typical trigger: 105-110%. Failure diverts cash from equity to pay debt.
Indenture
400-600 page legal document governing CLO. Specifies: tranche priorities, coverage tests, portfolio limits (max CCC, max single obligor, industry concentration), events of default, manager rights.
Institutional Loan
Leveraged loan held by institutional investors (CLOs, mutual funds, insurance) vs. banks. Syndicated across 50-200+ lenders. Traded in secondary market. Contrast: Traditional bank loan (held on balance sheet).

J-L

Junior Tranche
Lower-priority tranches (BB, B, equity) that absorb losses first. Higher yields compensate for higher risk. BB: SOFR + 500-600 bps. Equity: 12-18% IRR targets.
Leverage (Debt/EBITDA)
Measure of borrower indebtedness. Typical leveraged loan borrower: 4.5-6.0× total debt/EBITDA. First lien: 3.5-4.5×. > 7× considered overleveraged (elevated default risk).
LIBOR
London Interbank Offered Rate. Former benchmark for CLOs and loans (1997-2021). Replaced by SOFR (Secured Overnight Financing Rate) in 2021-2023 transition. Spread adjustment: LIBOR+450 → SOFR+465 (economically equivalent).
Liquidity Risk
Risk that investors cannot quickly sell positions without price concessions. Varies by tranche: AAA (10-30 bps bid-ask, high liquidity) to equity (5-15 point bid-ask, 2-4 month sale process).

M

Manager Risk
Risk that CLO manager makes poor credit decisions. Dominant variable for equity performance. Tier 1 managers outperform Tier 4 by 300-500 bps equity IRR through superior credit selection (2.5% vs. 4.2% default rates).
Mark-to-Market (MTM)
Valuation at current market prices vs. par/amortized cost. CLO debt experiences MTM volatility during stress (AAA fell to 88-92 cents in March 2020) but zero payment defaults. Holders marking to market realize paper losses.
Mezzanine Tranche
AA, A, BBB tranches between AAA and equity. Moderate risk-return profile. AA: SOFR + 165-200 bps. BBB: SOFR + 285-350 bps. Investment-grade ratings but meaningful yield pickup over AAA.
Middle Market CLO
CLO backed by private credit loans to smaller companies ($10-100M EBITDA). $50B market. Higher spreads (AAA: SOFR + 175-225 bps vs. +120-150 for BSL) compensate for illiquidity and 4.2% default rates.

N-O

Non-Call Period
First 2 years post-closing when equity cannot refinance debt. Protects debt holders from immediate call. After non-call, debt callable at 101-102 cents (small premium to par).
OC Test (Overcollateralization)
Coverage test requiring par value of collateral ≥ X% of par value of liabilities. Formula: OC = (Par Collateral) / (Par Debt). Example: AAA test requires 130%. If ratio falls to 129%, cash diverts from equity to AAA until ratio restored.
Obligor
Company that borrowed the loan. Typical CLO holds loans to 150-300 different obligors. Max single obligor: 2-3% of portfolio (prevents concentration risk).

P-R

Par Value
Face value of loan or tranche (100 cents). Used in OC tests regardless of market value. Example: Loan trades at 95 cents (market value) but counts as 100 cents in OC calculation (unless defaulted).
Payment Waterfall
Priority of cash flow distribution. Order: (1) Senior management fees, (2) AAA interest, (3) AA interest, (4) A interest, (5) BBB interest, (6) BB/B interest, (7) Subordinated fees, (8) Equity. Junior tranches only paid if seniors paid in full.
Prepayment Risk
Risk that loans refinance early. Impact: During reinvestment period, manager reinvests proceeds (neutral). Post-reinvestment, prepayments flow to debt holders (shortens maturity, reinvestment risk in falling rate environment).
Rating Agency
Moody's, S&P, Fitch. Rate CLO tranches based on expected loss modeling. Model 31-40% default scenarios (vs. 3.2% historical average). Fees: $400-700K for initial rating, $50-100K annually for surveillance.
Recovery Rate
Percentage of par value recovered after default. 1st lien secured: 76% average. Determines ultimate loss severity. Example: 3% default rate × 24% loss severity = 0.72% annual portfolio loss (absorbed by 8-12% equity tranche).
Refinancing (Refi)
Replacing existing debt with new debt at tighter spreads. Example: Call $300M AAA @ LIBOR+160, reissue @ SOFR+130. Saves 30 bps annually = $900K. Boosts equity IRR 80-120 bps. Peak refi year: 2021 ($100B+).
Reinvestment Period
First 4-5 years when manager can actively trade loans. Loan prepayments and sales reinvested into new loans (maintains leverage). After reinvestment period ends, CLO enters amortization (deleverages as loans prepay).
Reset
Extending reinvestment period and/or final maturity. Example: 2018 CLO in 2022 extends reinvestment from 2023→2027 (4 more years) and maturity from 2030→2035. Boosts equity IRR 150-300 bps by maintaining leverage and distributions.
Risk Retention
Dodd-Frank requirement (2014, reinstated 2018): Manager must retain 5% economic interest in CLO. Options: (1) Vertical slice (5% of every tranche), (2) Equity retention (100% of equity if equity ≥ 5% of deal). Aligns manager with investors.

S

Securitization
Process of pooling assets (loans) and issuing securities (tranches) backed by those assets. CLOs securitize leveraged loans. Other types: RMBS (mortgages), ABS (auto loans, credit cards), CMBS (commercial mortgages).
Senior Secured
Loan with first lien on borrower assets and first claim in bankruptcy. 99% of CLO collateral is senior secured. Key advantage: 76% recovery vs. 40% for unsecured bonds.
SOFR (Secured Overnight Financing Rate)
Benchmark replacing LIBOR (2021-2023). Based on U.S. Treasury repo market. More robust than LIBOR (less manipulation risk). Transition: LIBOR+450 → SOFR+465 (economically neutral). 100% of new CLOs SOFR-based (2024).
Spread
Basis points over SOFR. Compensates for credit risk, liquidity, structure. Example: AAA @ SOFR+130 bps. When SOFR = 5.35%, all-in yield = 6.65%. Spreads widen during stress (SOFR+130 → +200) as credit concerns rise.
Subordination
Percentage of tranches junior to a given tranche. AAA subordination: 35-40% (all tranches below AAA). Provides cushion against losses. Example: If 20% of portfolio defaults with 30% loss severity, total loss = 6% (absorbed by 35% subordination; AAA unimpaired).

T

Term Loan B
Institutional leveraged loan. "B" denotes institutional vs. amortizing bank term loan "A". Typical: $200M-$2B size, SOFR + 300-550 bps, 7-year maturity, minimal amortization (bullet repayment), broadly syndicated (100-200 lenders).
Tier 1 Manager
Elite CLO managers with $15B+ AUM, 15+ year track record, institutional platforms. Examples: Blackstone, Oak Hill, PGIM, Carlyle. Outperform Tier 4 by 300-500 bps equity IRR through superior deal flow, credit teams, 2.5% default rates (vs. 4.2% for Tier 4).
Tranche
Layer of CLO capital structure with distinct risk-return profile. Created through subordination. AAA (lowest risk, 60-65% of capital) to equity (highest risk, 8-12%). Each tranche has different priority in payment waterfall.
Trustee
Neutral third party (U.S. Bank, Wells Fargo, Wilmington Trust) that holds collateral, distributes cash flows, monitors compliance, produces monthly reports. Paid $30-75K annually (trivial relative to deal size). No economic interest in performance.
Turnover
Percentage of portfolio traded annually. Optimal: 25-40% during reinvestment period. < 20% = too passive (fails to upgrade portfolio). > 50% = over-trading (transaction costs, style drift). Tier 1 managers target 30-35%.

U-W

Underwriter
See Arranger. Investment banks that structure and distribute CLO tranches. Top 5 (JP Morgan, BofA, Citi, Barclays, Wells) control 60%+ market share. Earn 60-100 bps of deal size (AAA: 15-25 bps; BBB: 75-125 bps; BB: 200-300 bps).
Warehouse Period
Pre-issuance phase (3-9 months) when manager accumulates loans using temporary credit facility. Allows gradual portfolio construction. Costs: SOFR + 100-150 bps on borrowings. Reduces eventual equity IRR by 50-150 bps.
Waterfall
See Payment Waterfall. Sequential priority of cash distributions. Interest waterfall (quarterly): Fees → AAA → AA → A → BBB → BB → equity. Principal waterfall (post-reinvestment): Sequential pay-down AAA first, then AA, then A, etc.
Weighted Average Life (WAL)
Expected average time until loan principal repaid. Typical CLO portfolio: 4-5 year WAL (despite 7-year stated maturities, loans prepay). Used in modeling cash flows and returns.
Weighted Average Rating Factor (WARF)
Moody's metric for portfolio credit quality. Numeric rating (1 = Aaa, 2720 = Caa1). Lower = better quality. Typical CLO: 2800-3000 WARF (B2/B3 average rating). WARF > 3200 = elevated risk (more CCCs or lower-B credits).
Weighted Average Spread (WAS)
Average spread of loan portfolio over SOFR. Typical BSL CLO: 425-475 bps. Lower spread = higher quality borrowers (BB-/B+ credits). Higher spread = lower quality (B-/CCC credits). Trade-off: Spread vs. credit risk.

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