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Real Estate Securities
 6 Months Ended
Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]  
Real Estate Securities Real Estate Securities
We invest in real estate securities that we create and retain from our unconsolidated Sequoia securitizations or acquire from third parties. The following table presents the fair values of our real estate securities by type at June 30, 2024 and December 31, 2023.
Table 10.1 – Fair Value of Real Estate Securities by Type
(In Thousands)June 30, 2024December 31, 2023
Trading$119,624 $40,424 
Available-for-sale144,777 87,373 
Total Real Estate Securities$264,401 $127,797 
Our real estate securities include mortgage-backed securities, which are presented in accordance with their general position within a securitization structure based on their rights to cash flows. Senior securities are those interests in a securitization that generally have the first right to cash flows and are last in line to absorb losses. Mezzanine securities are interests that are generally subordinate to senior securities in their rights to receive cash flows, and have subordinate securities below them that are first to absorb losses. Subordinate securities are all interests below mezzanine. Nearly all of our residential securities are supported by collateral that was designated as prime at the time of issuance.
Trading Securities
We elected the fair value option for certain securities and classify them as trading securities. Our trading securities include both residential and multifamily mortgage-backed securities. The following table presents the fair value of trading securities by position and collateral type at June 30, 2024 and December 31, 2023.
Table 10.2 – Fair Value of Trading Securities by Position
(In Thousands)June 30, 2024December 31, 2023
Senior
Interest-only securities (1)
$115,287 $36,109 
Total Senior115,287 36,109 
Subordinate
Multifamily securities2,823 2,641 
Other third-party securities1,514 1,674 
Total Subordinate4,337 4,315 
Total Trading Securities$119,624 $40,424 
(1)Includes $32 million and $28 million of Sequoia certificated mortgage servicing rights at June 30, 2024 and December 31, 2023, respectively.
The following table presents the unpaid principal balance of trading securities by position and collateral type at June 30, 2024 and December 31, 2023.
Table 10.3 – Unpaid Principal Balance of Trading Securities by Position
(In Thousands)June 30, 2024December 31, 2023
Senior (1)
$— $— 
Subordinate16,098 16,567 
Total Trading Securities$16,098 $16,567 
(1)Our senior trading securities are comprised of interest-only securities, for which there is no principal balance.
The following table provides the activity of trading securities during the three and six months ended June 30, 2024 and 2023.
Table 10.4 – Trading Securities Activity
Three Months Ended June 30,Six Months Ended June 30,
(In Thousands)2024202320242023
Fair value of securities acquired$16,092 $6,183 $63,618 $7,883 
Fair value of securities sold— 51,578 — 55,087 
Net market valuation gains (losses) recorded (1)
1,600 6,495 16,075 8,456 
(1)Net market valuation gains (losses) on trading securities are recorded through Investment fair value changes, net and Mortgage banking activities, net on our consolidated statements of income.
AFS Securities
The following table presents the fair value of our available-for-sale ("AFS") securities by position and collateral type at June 30, 2024 and December 31, 2023.
Table 10.5 – Fair Value of Available-for-Sale Securities by Position
(In Thousands)June 30, 2024December 31, 2023
Senior
Other third-party securities$20,992 $— 
Total Senior20,992 — 
Mezzanine
Multifamily securities$2,834 $— 
Other third-party securities10,484 — 
Total Mezzanine13,318 — 
Subordinate
Sequoia securities$88,165 $78,942 
Multifamily securities8,869 4,460 
Other third-party securities13,433 3,971 
Total Subordinate110,467 87,373 
Total AFS Securities$144,777 $87,373 
The following table provides the activity of available-for-sale securities during the three and six months ended June 30, 2024 and 2023.
Table 10.6 – Available-for-Sale Securities Activity
Three Months Ended June 30,Six Months Ended June 30,
(In Thousands)2024202320242023
Fair value of securities acquired$33,386 $1,979 $47,442 $1,979 
Fair value of securities sold— 40,574 — 43,252 
Net unrealized gains (losses) on AFS securities (1)
1,054 (688)9,710 4,319 
(1)Net unrealized gains (losses) on AFS securities are recorded on our consolidated balance sheets through Accumulated other comprehensive loss.
At June 30, 2024, we had $26 million of AFS securities with contractual maturities less than five years, $4 million with contractual maturities greater than five years but less than ten years, and the remainder of our AFS securities had contractual maturities greater than ten years.
We often purchase AFS securities at a discount to their outstanding principal balances. To the extent we purchase an AFS security that has a likelihood of incurring a loss, we do not amortize into income the portion of the purchase discount that we do not expect to collect due to the inherent credit risk of the security. We may also expense a portion of our investment in the security to the extent we believe that principal losses will exceed the purchase discount. We designate any amount of unpaid principal balance that we do not expect to receive and thus do not expect to earn or recover as a credit reserve on the security. Any remaining net unamortized discounts or premiums on the security are amortized into income over time using the effective yield method.
The following table presents the components of carrying value (which equals fair value) of AFS securities at June 30, 2024 and December 31, 2023.
Table 10.7 – Carrying Value of AFS Securities
June 30, 2024
(In Thousands)SeniorMezzanineSubordinateTotal
Principal balance$21,000 $15,096 $164,449 $200,545 
Credit reserve— — (19,019)(19,019)
Unamortized discount, net(49)(2,159)(51,989)(54,197)
Amortized cost20,951 12,937 93,441 127,329 
Gross unrealized gains42 381 23,713 24,136 
Gross unrealized losses(1)— (5,348)(5,349)
CECL allowance— — (1,339)(1,339)
Carrying Value$20,992 $13,318 $110,467 $144,777 
December 31, 2023
(In Thousands)SeniorMezzanineSubordinateTotal
Principal balance$— $— $149,956 $149,956 
Credit reserve— — (23,436)(23,436)
Unamortized discount, net— — (46,885)(46,885)
Amortized cost— — 79,635 79,635 
Gross unrealized gains— — 16,973 16,973 
Gross unrealized losses— — (6,753)(6,753)
CECL allowance— — (2,482)(2,482)
Carrying Value$— $— $87,373 $87,373 
The following table presents the changes for the three and six months ended June 30, 2024, in unamortized discount and designated credit reserves on residential AFS securities.
Table 10.8 – Changes in Unamortized Discount and Designated Credit Reserves on AFS Securities
Three Months Ended 
 June 30, 2024		Six Months Ended 
 June 30, 2024
Credit
Reserve		Unamortized
Discount, Net		Credit
Reserve		Unamortized
Discount, Net
(In Thousands)
Beginning balance$19,717 $52,891 $23,436 $46,885 
Amortization of net discount— (337)— (429)
Realized credit recoveries (losses), net156 — 174 — 
Acquisitions— 789 — 3,150 
Sales, calls, other— — — — 
Transfers to (release of) credit reserves, net(854)854 (4,591)4,591 
Ending Balance$19,019 $54,197 $19,019 $54,197 
AFS Securities with Unrealized Losses
The following table presents the total carrying value (fair value) and unrealized losses of residential AFS securities that were in a gross unrealized loss position at June 30, 2024 and December 31, 2023.
Table 10.9 – AFS Securities in Gross Unrealized Loss Position by Holding Periods
Less Than 12 Consecutive Months12 Consecutive Months or Longer
Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses
(In Thousands)
June 30, 2024$10,084 $(97)$21,406 $(5,252)
December 31, 20232,374 (128)27,299 (6,625)
At June 30, 2024, after giving effect to purchases, sales, and extinguishment due to credit losses, our consolidated balance sheets included 76 AFS securities, of which 16 were in an unrealized loss position and 12 were in a continuous unrealized loss position for 12 consecutive months or longer. At December 31, 2023, our consolidated balance sheets included 66 AFS securities, of which 21 were in an unrealized loss position and 19 were in a continuous unrealized loss position for 12 consecutive months or longer.

Evaluating AFS Securities for Credit Losses
Gross unrealized losses on our AFS securities were $5 million at June 30, 2024. We evaluate all securities in an unrealized loss position to determine if the impairment is credit-related (resulting in an allowance for credit losses recorded in earnings) or non-credit-related (resulting in an unrealized loss through other comprehensive income). At June 30, 2024, we did not intend to sell any of our AFS securities that were in an unrealized loss position, and it is more likely than not that we will not be required to sell these securities before recovery of their amortized cost basis, which may be at their maturity. We review our AFS securities that are in an unrealized loss position to identify those securities with losses based on an assessment of changes in expected cash flows for such securities, which considers recent security performance and expected future performance of the underlying collateral.
At June 30, 2024, our current expected credit loss ("CECL") allowance related to our AFS securities was $1 million. AFS securities for which an allowance is recognized have experienced, or are expected to experience, adverse cash flow changes. In determining our estimate of cash flows for AFS securities we may consider factors such as structural credit enhancement, past and expected future performance of underlying mortgage loans, including timing of expected future cash flows, which are informed by prepayment rates, default rates, loss severities, delinquency rates, percentage of non-performing loans, FICO scores at loan origination, year of origination, loan-to-value ratios, and geographic concentrations, as well as general market assessments. Changes in our evaluation of these factors impacted the cash flows expected to be collected at the assessment date and were used to determine if there were credit-related adverse cash flows and if so, the amount of credit-related losses. Significant judgment is used in both our analysis of the expected cash flows for our AFS securities and any determination of security credit losses.
The table below summarizes the weighted average of the significant credit quality indicators we used for the credit loss allowance on our AFS securities at June 30, 2024.
Table 10.10 – Significant Credit Quality Indicators
June 30, 2024Subordinate Securities
Default rate0.8%
Loss severity20%
The following table details the activity related to the allowance for credit losses for AFS securities for the three and six months ended June 30, 2024.
Table 10.11 – Rollforward of Allowance for Credit Losses
Three Months Ended June 30, 2024Six Months Ended June 30, 2024
(In Thousands)
Beginning balance allowance for credit losses$1,853 $2,482 
Additions to allowance for credit losses on securities for which credit losses were not previously recorded— — 
Additional increases (or decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period(514)(1,143)
Reduction to allowance for securities sold during the period— — 
Ending balance of allowance for credit losses$1,339 $1,339 
Gains and losses from the sale of AFS securities are recorded as Realized gains, net, in our consolidated statements of income. During the six months ended June 30, 2024, we did not sell any AFS securities relative to the six months ended June 30, 2023, in which we realized gains of $1 million on sales of AFS securities.