Note 2 - Mortgage-backed Securities and U.S. Treasury Securities, At Fair Value (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Marketable Securities [Table Text Block]

(in thousands)
	September 30, 2023		December 31, 2022
Pass-Through RMBS Certificates:
Fixed-rate Mortgages	$	4,502,115	$	3,519,906
Total Pass-Through Certificates		4,502,115		3,519,906
Structured RMBS Certificates:
Interest-Only Securities		17,833		19,669
Inverse Interest-Only Securities		277		427
Total Structured RMBS Certificates		18,110		20,096
Total	$	4,520,225	$	3,540,002

Gain (Loss) on Securities [Table Text Block]

(in thousands)
	Nine Months Ended September 30,
	2023		2022
Proceeds from sales of RMBS	$	-	$	2,731,497
Carrying value of RMBS sold		-		(2,864,169	)
Net loss on sales of RMBS	$	-	$	(132,672	)
Gross gain on sales of RMBS	$	-	$	2,705
Gross loss on sales of RMBS		-		(135,377	)
Net loss on sales of RMBS	$	-	$	(132,672	)