Kilambi News
Monday, October 19, 2026

BANK 2021-BNK31

Sunday, October 18, 2026

Tranches, pool and monthly delinquency indicator for BANK 2021-BNK31.

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

← Deal index · CMBS market

Current pool balance
$870.2M (September 2026)
Original pool balance
$905.2M
Loans at issuance
83
Closing date
2021-02-11
Weighted average coupon at issuance
3.22%
Weighted average LTV at issuance
36.3%
30+ delinquent (latest)
0.00%
Realized stress score
52.3
Net rating change since issuance
+0.00 notches

Tranches

ClassOriginal balanceCredit support (computed)CouponCUSIPFitchKBRAS&PMoody'sDBRS
A-1$24.2M97.19%0.455% fixed06541AAZ3PIFWRNRnot yet reportednot yet reported
A-3$252.0M67.89%1.771% fixed06541ABB5AAAAAAAAA (sf)not yet reportednot yet reported
A-3-1not yet reportednot yet reported1.271% fixed06541ABC3AAAAAAAAA (sf)not yet reportednot yet reported
A-3-2not yet reportednot yet reported0.771% fixed06541ABD1AAAAAAAAA (sf)not yet reportednot yet reported
A-3-X1not yet reportedInterest only0.500% fixed06541ABE9AAAAAAAAA (sf)not yet reportednot yet reported
A-3-X2not yet reportedInterest only1.000% fixed06541ABF6AAAAAAAAA (sf)not yet reportednot yet reported
A-4$297.9M33.24%2.036% fixed06541ABG4AAAAAAAAA (sf)not yet reportednot yet reported
A-4-1not yet reportednot yet reported1.536% fixed06541ABH2AAAAAAAAA (sf)not yet reportednot yet reported
A-4-2not yet reportednot yet reported1.036% fixed06541ABJ8AAAAAAAAA (sf)not yet reportednot yet reported
A-4-X1not yet reportedInterest only0.500% fixed06541ABK5AAAAAAAAA (sf)not yet reportednot yet reported
A-4-X2not yet reportedInterest only1.000% fixed06541ABL3AAAAAAAAA (sf)not yet reportednot yet reported
A-S$94.6M22.24%2.211% fixed06541ABP4AAAAAAAAA (sf)not yet reportednot yet reported
A-S-1not yet reportednot yet reported1.711% fixed06541ABQ2AAAAAAAAA (sf)not yet reportednot yet reported
A-S-2not yet reportednot yet reported1.211% fixed06541ABR0AAAAAAAAA (sf)not yet reportednot yet reported
A-S-X1not yet reportedInterest only0.500% fixed06541ABS8AAAAAAAAA (sf)not yet reportednot yet reported
A-S-X2not yet reportedInterest only1.000% fixed06541ABT6AAAAAAAAA (sf)not yet reportednot yet reported
A-SB$27.9M19.00%1.739% fixed06541ABA7AAAAAAAAA (sf)not yet reportednot yet reported
B$37.6M14.63%2.383% floating (WAC)06541ABU3AA-AA-AA- (sf)not yet reportednot yet reported
B-1not yet reportednot yet reported1.883% floating (WAC)06541ABV1AA-AA-AA- (sf)not yet reportednot yet reported
B-2not yet reportednot yet reported1.383% floating (WAC)06541ABW9AA-AA-AA- (sf)not yet reportednot yet reported
B-X1not yet reportedInterest only0.500% fixed06541ABX7AA-AA-AA- (sf)not yet reportednot yet reported
B-X2not yet reportedInterest only1.000% fixed06541ABY5AA-AA-AA- (sf)not yet reportednot yet reported
C$34.4M10.63%2.545% floating (WAC)06541ABZ2A-A-NRnot yet reportednot yet reported
C-1not yet reportednot yet reported2.045% floating (WAC)06541ACA6A-A-NRnot yet reportednot yet reported
C-2not yet reportednot yet reported1.545% floating (WAC)06541ACB4A-A-NRnot yet reportednot yet reported
C-X1not yet reportedInterest only0.500% fixed06541ACC2A-A-NRprelimnot yet reportednot yet reported
C-X2not yet reportedInterest only1.000% fixed06541ACD0A-A-NRprelimnot yet reportednot yet reported
D$21.5M8.13%2.500% floating (WAC)06541AAJ9BBBBBBNRprelimnot yet reportednot yet reported
E$16.1M6.25%2.500% floating (WAC)06541AAL4BBB-BBB-NRprelimnot yet reportednot yet reported
F$17.2M4.25%2.188% floating (WAC + -100 bp)06541AAN0BB-BB-NRprelimnot yet reportednot yet reported
G$8.6M3.25%2.188% floating (WAC + -100 bp)06541AAQ3B-B-NRprelimnot yet reportednot yet reported
H$27.9M0.00%2.188% floating (WAC + -100 bp)06541AAS9not yet reportednot yet reportedNRprelimnot yet reportednot yet reported
Rnot yet reportednot yet reportednot yet reported06541AAW0not yet reportednot yet reportednot yet reportednot yet reportednot yet reported
Vnot yet reportednot yet reportednot yet reported06541AAU4not yet reportednot yet reportednot yet reportednot yet reportednot yet reported
X-A$601.9MInterest only1.340% floating06541ABM1AAAAAAAAA (sf)not yet reportednot yet reported
X-B$166.6MInterest only0.869% floating06541ABN9A-AAANRnot yet reportednot yet reported
X-D$37.6MInterest only0.688% floating06541AAA8BBB-BBB-NRnot yet reportednot yet reported
X-F$17.2MInterest only1.000% fixed06541AAC4BB-BB-NRnot yet reportednot yet reported
X-G$8.6MInterest only1.000% fixed06541AAE0B-B-NRprelimnot yet reportednot yet reported
X-H$27.9MInterest only1.000% fixed06541AAG5not yet reportednot yet reportedNRnot 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

Loans83
Original loan balance$1.10B
Weighted average coupon3.22%
Weighted average LTV36.3%
Median loan LTV42.0%
Full-term interest only (share of balance)74.1%
Balloon loans (share of balance)99.7%
Largest loan (share of balance)8.2%
Five largest loans (share of balance)29.8%
Occupancy at issuance (weighted average)93.9%

Realized outcomes

Months reported68
Peak 30+ delinquency2.69% (April 2025)
Ever severe (share of original balance)11.48%
Ever modified (share of original balance)7.76%
Past scheduled maturity (share of original balance)0.00%
Non-performing matured (share of original balance)24.07%
Maximum servicer advances (share of balance)0.35%
Median DSCR, first year3.04
Median DSCR, latest2.94
Realized stress score52.3

Property types

Property typeOriginal balanceShare of pool
Office$282.9M25.7%
Retail$137.4M12.5%
Self storage$137.0M12.4%
Industrial$128.2M11.6%
Healthcare$71.1M6.5%
Mixed use$13.1M1.2%
Multifamily$9.8M0.9%
Manufactured housing$2.9M0.3%
Other (code 98)$2.0M0.2%

Property type is reported for 71.2% of the pool balance; shares are of the full pool.

Largest loans

PropertyLocationOriginal balanceShare of poolCouponOriginated
MCCLELLAN PARKMcClellan, CA$90.0M8.2%3.31%2020
605 THIRD AVENUENew York, NY$80.0M7.3%1.94%2020
MIAMI DESIGN DISTRICTMiami, FL$80.0M7.3%4.13%2020
ExchangeRight Net Leased Portfolio #42not yet reported$40.5M3.7%3.41%2020
250 WEST 57TH STREETNew York, NY$38.0M3.4%2.83%2020

Delinquency and stress indicator

0%3%5%8%11%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 CUSIP40 of 40
Classes with a current rating in the dataset38 of 40
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.