Fitch Ratings has affirmed all classes of Fitch-rated 2015 Vintage Freddie Mac transactions.

This includes 53 classes from nine Freddie Mac multifamily mortgage pass-through certificates (FREMF), along with 27 classes from nine Freddie Mac Structured Pass-Through Certificates.

In addition, Fitch has affirmed the unenhanced ratings on 27 classes of the multifamily pass-through certificates and 27 classes of the Freddie Mac Structured Pass-Through Certificates.

Rating ActionsENTITY/DEBT	RATING		PRIOR

FREMF 2015-K48

A-1 30293HAL9

LT	AAAsf 	Affirmed		AAAsf

A-1 30293HAL9

ULT	AAAsf 	Affirmed		AAAsf

A-2 30293HAN5

LT	AAAsf 	Affirmed		AAAsf

A-2 30293HAN5

ULT	AAAsf 	Affirmed		AAAsf

B 30293HAE5

LT	BBB+sf 	Affirmed		BBB+sf

C 30293HAG0

LT	BBB-sf 	Affirmed		BBB-sf

X1 30293HAQ8

LT	AAAsf 	Affirmed		AAAsf

X1 30293HAQ8

ULT	AAAsf 	Affirmed		AAAsf

X2-A 30293HAA3

LT	AAAsf 	Affirmed		AAAsf

FREMF 2015-K43

A-1 30286XAA7

LT	AAAsf 	Affirmed		AAAsf

A-1 30286XAA7

ULT	AAAsf 	Affirmed		AAAsf

A-2 30286XAC3

LT	AAAsf 	Affirmed		AAAsf

A-2 30286XAC3

ULT	AAAsf 	Affirmed		AAAsf

B 30286XAN9

LT	A-sf 	Affirmed		A-sf

C 30286XAQ2

LT	BBBsf 	Affirmed		BBBsf

X1 30286XAE9

LT	AAAsf 	Affirmed		AAAsf

X1 30286XAE9

ULT	AAAsf 	Affirmed		AAAsf

X2-A 30286XAJ8

LT	AAAsf 	Affirmed		AAAsf

FREMF 2015-K46

A-1 30292RAA2

LT	AAAsf 	Affirmed		AAAsf

A-1 30292RAA2

ULT	AAAsf 	Affirmed		AAAsf

A-2 30292RAC8

LT	AAAsf 	Affirmed		AAAsf

A-2 30292RAC8

ULT	AAAsf 	Affirmed		AAAsf

B 30292RAJ3

LT	BBB+sf 	Affirmed		BBB+sf

C 30292RAL8

LT	BBB-sf 	Affirmed		BBB-sf

X1 30292RAE4

LT	AAAsf 	Affirmed		AAAsf

X1 30292RAE4

ULT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K043

A-1 3137BGJZ3

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BGJZ3

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BGK24

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BGK24

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BGK32

LT	AAAsf 	Affirmed		AAAsf

X1 3137BGK32

ULT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K046

A-1 3137BJP56

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BJP56

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BJP64

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BJP64

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BJP72

LT	AAAsf 	Affirmed		AAAsf

X1 3137BJP72

ULT	AAAsf 	Affirmed		AAAsf

FREMF 2015-K47

A-1 30293AAA8

LT	AAAsf 	Affirmed		AAAsf

A-1 30293AAA8

ULT	AAAsf 	Affirmed		AAAsf

A-2 30293AAC4

LT	AAAsf 	Affirmed		AAAsf

A-2 30293AAC4

ULT	AAAsf 	Affirmed		AAAsf

B 30293AAN0

LT	BBB+sf 	Affirmed		BBB+sf

C 30293AAQ3

LT	BBB-sf 	Affirmed		BBB-sf

X1 30293AAE0

LT	AAAsf 	Affirmed		AAAsf

X1 30293AAE0

ULT	AAAsf 	Affirmed		AAAsf

X2-A 30293AAJ9

LT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K047

A-1 3137BKRH5

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BKRH5

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BKRJ1

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BKRJ1

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BKRK8

LT	AAAsf 	Affirmed		AAAsf

X1 3137BKRK8

ULT	AAAsf 	Affirmed		AAAsf

FREMF 2015-K49

A-1 30287TAA5

LT	AAAsf 	Affirmed		AAAsf

A-1 30287TAA5

ULT	AAAsf 	Affirmed		AAAsf

A-2 30287TAC1

LT	AAAsf 	Affirmed		AAAsf

A-2 30287TAC1

ULT	AAAsf 	Affirmed		AAAsf

B 30287TAN7

LT	BBB+sf 	Affirmed		BBB+sf

C 30287TAQ0

LT	BBB-sf 	Affirmed		BBB-sf

X1 30287TAE7

LT	AAAsf 	Affirmed		AAAsf

X1 30287TAE7

ULT	AAAsf 	Affirmed		AAAsf

X2-A 30287TAJ6

LT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K049

A-1 3137BLMY1

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BLMY1

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BLMZ8

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BLMZ8

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BLN20

LT	AAAsf 	Affirmed		AAAsf

X1 3137BLN20

ULT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K045

A-1 3137BHX51

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BHX51

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BHXJ1

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BHXJ1

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BHXK8

LT	AAAsf 	Affirmed		AAAsf

X1 3137BHXK8

ULT	AAAsf 	Affirmed		AAAsf

FREMF 2015-K51

A-1 30293XAA8

LT	AAAsf 	Affirmed		AAAsf

A-1 30293XAA8

ULT	AAAsf 	Affirmed		AAAsf

A-2 30293XAB6

LT	AAAsf 	Affirmed		AAAsf

A-2 30293XAB6

ULT	AAAsf 	Affirmed		AAAsf

B 30293XAJ9

LT	BBB+sf 	Affirmed		BBB+sf

C 30293XAL4

LT	BBB-sf 	Affirmed		BBB-sf

X1 30293XAC4

LT	AAAsf 	Affirmed		AAAsf

X1 30293XAC4

ULT	AAAsf 	Affirmed		AAAsf

X2-A 30293XAE0

LT	AAAsf 	Affirmed		AAAsf

FREMF 2015-K44

A-1 30292NAR4

LT	AAAsf 	Affirmed		AAAsf

A-1 30292NAR4

ULT	AAAsf 	Affirmed		AAAsf

A-2 30292NAT0

LT	AAAsf 	Affirmed		AAAsf

A-2 30292NAT0

ULT	AAAsf 	Affirmed		AAAsf

B 30292NAG8

LT	BBB+sf 	Affirmed		BBB+sf

C 30292NAK9

LT	BBB-sf 	Affirmed		BBB-sf

X1 30292NAV5

LT	AAAsf 	Affirmed		AAAsf

X1 30292NAV5

ULT	AAAsf 	Affirmed		AAAsf

X2-A 30292NAA1

LT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K044

A-1 3137BHCX3

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BHCX3

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BHCY1

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BHCY1

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BHCZ8

LT	AAAsf 	Affirmed		AAAsf

X1 3137BHCZ8

ULT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K050

A-1 3137BLW87

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BLW87

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BLW95

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BLW95

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BLWA2

LT	AAAsf 	Affirmed		AAAsf

X1 3137BLWA2

ULT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K051

A-1 3137BM7B6

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BM7B6

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BM7C4

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BM7C4

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BM7D2

LT	AAAsf 	Affirmed		AAAsf

X1 3137BM7D2

ULT	AAAsf 	Affirmed		AAAsf

FREMF 2015-K50

A-1 30293WAL6

LT	AAAsf 	Affirmed		AAAsf

A-1 30293WAL6

ULT	AAAsf 	Affirmed		AAAsf

A-2 30293WAN2

LT	AAAsf 	Affirmed		AAAsf

A-2 30293WAN2

ULT	AAAsf 	Affirmed		AAAsf

B 30293WAE2

LT	BBB+sf 	Affirmed		BBB+sf

C 30293WAG7

LT	BBB-sf 	Affirmed		BBB-sf

X1 30293WAQ5

LT	AAAsf 	Affirmed		AAAsf

X1 30293WAQ5

ULT	AAAsf 	Affirmed		AAAsf

X2-A 30293WAA0

LT	AAAsf 	Affirmed		AAAsf

Freddie Mac Structured Pass-Through Certificates 2015-K048

A-1 3137BL6J2

LT	AAAsf 	Affirmed		AAAsf

A-1 3137BL6J2

ULT	AAAsf 	Affirmed		AAAsf

A-2 3137BLAC2

LT	AAAsf 	Affirmed		AAAsf

A-2 3137BLAC2

ULT	AAAsf 	Affirmed		AAAsf

X1 3137BLAD0

LT	AAAsf 	Affirmed		AAAsf

X1 3137BLAD0

ULT	AAAsf 	Affirmed		AAAsf

FREMF 2015-K45

A-1 30292PAL2

LT	AAAsf 	Affirmed		AAAsf

A-1 30292PAL2

ULT	AAAsf 	Affirmed		AAAsf

A-2 30292PAM0

LT	AAAsf 	Affirmed		AAAsf

A-2 30292PAM0

ULT	AAAsf 	Affirmed		AAAsf

B 30292PAE8

LT	BBB+sf 	Affirmed		BBB+sf

C 30292PAG3

LT	BBB-sf 	Affirmed		BBB-sf

X1 30292PAN8

LT	AAAsf 	Affirmed		AAAsf

X1 30292PAN8

ULT	AAAsf 	Affirmed		AAAsf

X2-A 30292PAA6

LT	AAAsf 	Affirmed		AAAsf

View additional rating details

KEY RATING DRIVERS

Freddie Mac Guarantee, Credit Linked Notes: The multifamily mortgage pass-through certificates are guaranteed by Freddie Mac. On Aug. 3, 2020, Fitch affirmed Freddie Mac's rating at 'AAA' and revised the Outlook to Negative from Stable. This action followed Fitch's affirmation of the U.S. sovereign's 'AAA' Issuer Default Rating and revision of its Rating Outlook to Negative from Stable on July 31, 2020.

The affirmations of the long-term ratings are based on the generally stable pool performance and loss expectations and are supported by the guarantee. Although the IO X-1 classes are guaranteed, the long-term rating for the IO X-1 classes are based on the pass-through to the referenced A-1 and A-2 certificates. Although Freddie Mac does not guarantee the structured pass-through certificates, they benefit indirectly from this guarantee. The Freddie Mac SPC certificates represent a pass-through interest in the corresponding multifamily mortgage pass-through certificates.

Stable Loss Expectations: Fitch's unenhanced ratings are based on an analysis of the underlying collateral pools and do not give any credit to the Freddie Mac guarantee. The affirmations are based on the stable performance and loss expectations of the underlying collateral. Pool level losses ranged from 2.1% to 5.5%. There are 72 loans on the servicer's watch lists (9.9% of the entire vintage), and no specially serviced loans. Fitch has identified 121 loans as Fitch Loans of Concern (FLOCs) due to declining performance, including economic stress as a result of the coronavirus pandemic, student concentrations and senior housing concentrations. Average FLOC concentration was approximately 15.9% (ranging from 9% to 23%), with the highest concentrations in FREMF 2015-K51 (23%), FREMF 2015-K48 (19%) and FREMF 2015-K45 (18.5%).

Changes to Credit Enhancement (CE): There has been minimal change to CE since issuance. As of January 2021, the pool balances have paid down an average of 3.5% (ranging from 2.5% to 4.1%). Ninety-three loans (10% of the vintage) are fully defeased, with individual pool defeasance ranging from 4.5% to 17.4% of the respective pools.

Coronavirus Exposure: Nineteen loans (1.8% of the vintage) are secured by senior housing properties. Forty-three loans (7.7%) are secured by a student housing property or multifamily with high student concentration. These multifamily subclassifications are considered more volatile and/or may require more operational experience than traditional multifamily assets. In addition, 25 loans (3.1%) reported a full YE DSCR less than 1.20x, based on the servicers most recent reporting. Fitch's base case analysis applied additional stresses to these multifamily properties/loans given the significant declines in property-level cash flow expected in the short term as a result the coronavirus pandemic. These additional stresses did not affect the ratings or Outlooks due to sufficient CE and overall stable performance of the pool.

RATING SENSITIVITIES

Stable Rating Outlooks on the long-term ratings of classes the senior classes (those rated 'AAAsf') and corresponding IO reflect both the overall stable pool performance, and benefit from the Freddie Mac guarantee. The Stable Rating Outlooks on the unenhanced ratings reflect stable pool performance, increasing CE and expected continued amortization.

Factors that could, individually or collectively, lead to positive rating action/upgrade:

Upgrades of classes B and C could occur if there is stable to improved asset performance coupled with additional paydown and/or defeasance. However, adverse selection and increased concentrations or the underperformance of particular loans could cause this trend to reverse.

Factors that could, individually or collectively, lead to negative rating action/downgrade:

Downgrades on the unenhanced ratings could occur with an increase in pool level expected losses from underperforming or specially serviced loans. While not expected, Downgrades to classes B and C could occur if loan performance declines significantly, loans face difficulty refinancing at maturity or properties vulnerable to the coronavirus do not return to pre-pandemic levels.

The unenhanced ratings represent a detachment from the guarantee provided by Freddie Mac for their respective classes. Should the performance of the underlying collateral deteriorate enough to warrant a Downgrade to any of the classes benefiting from the Freddie Mac guarantee, only the unenhanced ratings would be downgraded. The long-term ratings for those classes that benefit from a guarantee would be rated at the higher of Freddie Mac or the underlying rating without the guarantee.

In addition to its baseline scenario related to the coronavirus, Fitch envisions a downside scenario where the health crisis is prolonged beyond 2021; should this scenario play out, Fitch expects negative rating actions including Downgrades or Negative Rating Outlooks to the long-term and unenhanced ratings.

For more information on Fitch's original rating sensitivity on the transactions, please refer to the transaction's presale report.

BEST/WORST CASE RATING SCENARIO

International scale credit ratings of Structured Finance transactions have a best-case rating upgrade scenario (defined as the 99th percentile of rating transitions, measured in a positive direction) of seven notches over a three-year rating horizon; and a worst-case rating downgrade scenario (defined as the 99th percentile of rating transitions, measured in a negative direction) of seven notches over three years. The complete span of best- and worst-case scenario credit ratings for all rating categories ranges from 'AAAsf' to 'Dsf'. Best- and worst-case scenario credit ratings are based on historical performance. For more information about the methodology used to determine sector-specific best- and worst-case scenario credit ratings, visit https://www.fitchratings.com/site/re/10111579.

USE OF THIRD PARTY DUE DILIGENCE PURSUANT TO SEC RULE 17G -10

Form ABS Due Diligence-15E was not provided to, or reviewed by, Fitch in relation to this rating action.

REFERENCES FOR SUBSTANTIALLY MATERIAL SOURCE CITED AS KEY DRIVER OF RATING

The principal sources of information used in the analysis are described in the Applicable Criteria.

PUBLIC RATINGS WITH CREDIT LINKAGE TO OTHER RATINGS

The multifamily mortgage pass-through certificates are guaranteed by Freddie Mac. The affirmations of the long-term ratings are based on the generally stable pool performance and loss expectations and are supported by the guarantee.

ESG CONSIDERATIONS

Unless otherwise disclosed in this section, the highest level of ESG credit relevance is a score of '3'. This means ESG issues are credit-neutral or have only a minimal credit impact on the entity, either due to their nature or the way in which they are being managed by the entity. For more information on Fitch's ESG Relevance Scores, visit www.fitchratings.com/esg

Additional information is available on www.fitchratings.com

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