Kilambi News
Monday, October 19, 2026

BANK 2021-BNK37

Sunday, October 18, 2026

Tranches, pool and monthly delinquency indicator for BANK 2021-BNK37.

Data as of loan data through September 2026; ratings as held in the dataset at build

← Deal index · CMBS market

Current pool balance
$1.17B (September 2026)
Original pool balance
$1.32B
Loans at issuance
85
Closing date
2021-11-22
Weighted average coupon at issuance
3.11%
Weighted average LTV at issuance
35.7%
30+ delinquent (latest)
0.00%
Realized stress score
39.1
Net rating change since issuance
+0.00 notches

Tranches

ClassOriginal balanceCredit support (computed)CouponCUSIPFitchKBRAS&PMoody'sDBRS
A-1$19.4M98.46%1.186% fixed06540LAW7AAAAAAnot yet reportedAaanot yet reported
A-2$147.3M86.74%2.513% fixed06540LAX5AAAAAAnot yet reportedAaanot yet reported
A-3$74.2M80.84%2.588% fixed06540LAY3AAAAAAnot yet reportedAaanot yet reported
A-4$234.5M62.18%2.370% fixed06540LBA4AAAAAAnot yet reportedAaanot yet reported
A-4-1not yet reportednot yet reported1.870% fixed06540LBB2AAAAAAnot yet reportedAaanot yet reported
A-4-2not yet reportednot yet reported1.370% fixed06540LBC0AAAAAAnot yet reportedAaanot yet reported
A-4-X1not yet reportedInterest only0.500% fixed06540LBD8AAAAAAnot yet reportedAaanot yet reported
A-4-X2not yet reportedInterest only1.000% fixed06540LBE6AAAAAAnot yet reportedAaanot yet reported
A-5$380.0M31.96%2.618% floating (WAC)06540LBF3AAAAAAnot yet reportedAaanot yet reported
A-5-1not yet reportednot yet reported2.118% floating (WAC)06540LBG1AAAAAAnot yet reportedAaanot yet reported
A-5-2not yet reportednot yet reported1.618% floating (WAC)06540LBH9AAAAAAnot yet reportedAaanot yet reported
A-5-X1not yet reportedInterest only0.500% fixed06540LBJ5AAAAAAnot yet reportedAaanot yet reported
A-5-X2not yet reportedInterest only1.000% fixed06540LBK2AAAAAAnot yet reportedAaanot yet reported
A-S$143.0M20.58%2.851% floating (WAC)06540LBN6AAAAAAnot yet reportedAa1not yet reported
A-S-1not yet reportednot yet reported2.351% floating (WAC)06540LBP1AAAAAAnot yet reportedAa1not yet reported
A-S-2not yet reportednot yet reported1.851% floating (WAC)06540LBQ9AAAAAAnot yet reportedAa1not yet reported
A-S-X1not yet reportedInterest only0.500% fixed06540LBR7AAAAAAnot yet reportedAa1not yet reported
A-S-X2not yet reportedInterest only1.000% fixed06540LBS5AAAAAAnot yet reportedAa1not yet reported
A-SB$24.6M18.63%2.487% fixed06540LAZ0AAAAAAnot yet reportedAaanot yet reported
B$47.1M14.88%2.983% floating (WAC)06540LBT3AA-AAnot yet reportednot yet reportednot yet reported
B-1not yet reportednot yet reported2.483% floating (WAC)06540LBU0AA-AAnot yet reportednot yet reportednot yet reported
B-2not yet reportednot yet reported1.983% floating (WAC)06540LBV8AA-AAnot yet reportednot yet reportednot yet reported
B-X1not yet reportedInterest only0.500% fixed06540LBW6AA-AAnot yet reportednot yet reportednot yet reported
B-X2not yet reportedInterest only1.000% fixed06540LCE5AA-AAnot yet reportednot yet reportednot yet reported
C$53.4M10.63%3.109% floating (WAC)06540LBX4A-A-not yet reportednot yet reportednot yet reported
C-1not yet reportednot yet reported2.609% floating (WAC + -50 bp)06540LCD7A-A-not yet reportednot yet reportednot yet reported
C-2not yet reportednot yet reported2.109% floating (WAC + -100 bp)06540LBY2A-A-not yet reportednot yet reportednot yet reported
C-X1not yet reportedInterest only0.500% fixed06540LBZ9A-A-not yet reportednot yet reportednot yet reported
C-X2not yet reportedInterest only1.000% fixed06540LCA3A-A-not yet reportednot yet reportednot yet reported
D$31.4M8.13%2.500% floating (WAC)06540LAJ6BBBBBB+not yet reportednot yet reportednot yet reported
E$23.6M6.25%2.500% floating (WAC)06540LAL1BBB-BBB-not yet reportednot yet reportednot yet reported
F$26.7M4.13%2.400% floating (WAC)06540LAN7BB-BB-not yet reportednot yet reportednot yet reported
G$12.6M3.13%2.400% floating (WAC)06540LAQ0B-B-not yet reportednot yet reportednot yet reported
H$39.3M0.00%2.400% floating (WAC)06540LAS6not yet reportednot yet reportednot yet reportednot yet reportednot yet reported
Rnot yet reportednot yet reportednot yet reported06540LAU1not yet reportednot yet reportednot yet reportednot yet reportednot yet reported
X-A$880.0MInterest only0.613% floating06540LBL0AAAAAAnot yet reportedAaanot yet reported
X-B$90.1MInterest only0.225% floating06540LBM8AA-AAAnot yet reportednot yet reportednot yet reported
X-D$55.0MInterest only0.609% floating06540LAA5BBB-BBB-not yet reportednot yet reportednot yet reported
X-F$26.7MInterest only0.709% floating06540LAC1BB-BB-not yet reportednot yet reportednot yet reported
X-G$12.6MInterest only0.709% floating06540LAE7B-B-not yet reportednot yet reportednot yet reported
X-H$39.3MInterest only0.709% floating06540LAG2not yet reportednot yet reportednot yet reportednot yet reportednot yet reported

Credit support is computed from the class stack order in the prospectus: the share of the deal's principal balance in classes junior to the class. Interest-only classes carry a notional balance and no principal support figure. Ratings are the latest held in the dataset for each class and agency; NR means the agency shows the class as not rated, WR that the rating was withdrawn, PIF that the class has been paid in full. Any other status value is shown exactly as the agency reports it. A + after a CUSIP marks a class with companion CUSIPs in the dataset.

Pool at issuance

Loans85
Original loan balance$1.42B
Weighted average coupon3.11%
Weighted average LTV35.7%
Median loan LTV44.3%
Full-term interest only (share of balance)77.7%
Balloon loans (share of balance)100.0%
Largest loan (share of balance)8.2%
Five largest loans (share of balance)31.6%
Occupancy at issuance (weighted average)94.7%

Realized outcomes

Months reported59
Peak 30+ delinquency1.90% (May 2025)
Ever severe (share of original balance)1.64%
Ever modified (share of original balance)4.32%
Past scheduled maturity (share of original balance)0.00%
Non-performing matured (share of original balance)20.45%
Maximum servicer advances (share of balance)0.06%
Median DSCR, first year3.68
Median DSCR, latest2.87
Realized stress score39.1

Property types

Property typeOriginal balanceShare of pool
Office$466.9M33.0%
Retail$326.4M23.1%
Industrial$121.5M8.6%
Multifamily$121.5M8.6%
Healthcare$61.2M4.3%
Other (code 98)$56.5M4.0%
Self storage$45.8M3.2%
Mixed use$39.0M2.8%
Manufactured housing$6.2M0.4%

Property type is reported for 87.9% of the pool balance; shares are of the full pool.

Largest loans

PropertyLocationOriginal balanceShare of poolCouponOriginated
ONE NORTH WACKERChicago, IL$115.5M8.2%2.72%2021
1201 LAKE ROBBINSThe Woodlands, TX$100.0M7.1%3.83%2021
LONDON TERRACE TOWERS OWNERS, INC.New York, NY$82.0M5.8%2.32%2021
PARK AVENUE PLAZANew York, NY$75.0M5.3%2.84%2021
1 UNION SQUARE SOUTH RETAILNew York, NY$75.0M5.3%2.27%2021

Delinquency and stress indicator

0%2%4%7%9%20222023202420252026

▬ 30+ days delinquent · ▬ Distressed (90+, foreclosure, REO, non-performing matured)

Monthly shares of the deal's reported balance, from the deal indicator series in the dataset. Months in which fewer than half of the reported loans carry a delinquency status code are not plotted.

Ratings

Classes with a CUSIP41 of 41
Classes with a current rating in the dataset38 of 41
Net rating change since issuance+0.00 notches (balance-weighted)
Delinquency threshold crossedNot crossed in the dataset
First downgradeNone recorded

Sources: SEC Form ABS-EE asset-level reports, Form 10-D distribution reports and the deal prospectus; rating histories published under SEC Rule 17g-7(b) and agency releases. Definitions are in the methods note on the market page.