
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
September 30, 2020
Held to Maturity
Mortgage-backed securities ("MBS"):
U.S. government agencies	$	27,161	$	1,635	$	(3)	$	28,793
Private label residential	229		307		(1)		535

Bank issued trust preferred securities	500		—		(1)		499
Total	$	27,890	$	1,942	$	(5)	$	29,827

Available for Sale
MBS: U.S. government agencies	$	57,797	$	178	$	(68)	$	57,907
Total	$	57,797	$	178	$	(68)	$	57,907

September 30, 2019
Held to Maturity
MBS:
U.S. government agencies	$	27,786	$	999	$	(2)	$	28,783
Private label residential	317		490		(1)		806
U.S. Treasury and U.S. government agency securities	2,999		—		(8)		2,991
Total	$	31,102	$	1,489	$	(11)	$	32,580

Available for Sale
MBS: U.S. government agencies	$	22,418	$	114	$	—	$	22,532


Total	$	22,418	$	114	$	—	$	22,532


	Less Than 12 Months					12 Months or Longer					Total
	Estimated Fair Value		Gross Unrealized Losses		Qty	Estimated Fair Value		Gross Unrealized Losses		Qty	Estimated Fair Value		Gross Unrealized Losses
Held to Maturity
MBS:
U.S. government agencies	$	5,130	$	(2)	4	$	39	$	(1)	4	$	5,169	$	(3)
Private label residential	7		—		1	11		(1)		2	18		(1)
Bank issued trust preferred securities	499		(1)		1	—		—		—	499		(1)
Total	$	5,636	$	(3)	6	$	50	$	(2)	6	$	5,686	$	(5)

Available for Sale
MBS:
U.S. government agencies	$	21,464	$	(68)	11	$	—	$	—	—	$	21,464	$	(68)
Total	$	21,464	$	(68)	11	$	—	$	—	—	$	21,464	$	(68)


	Less Than 12 Months					12 Months or Longer					Total
	Estimated Fair Value		Gross Unrealized Losses		Qty	Estimated Fair Value		Gross Unrealized Losses		Qty	Estimated Fair Value		Gross Unrealized Losses
Held to Maturity
MBS:
U.S. government agencies	$	291	$	(1)	2	$	76	$	(1)	6	$	367	$	(2)
Private label residential	—		—		—	23		(1)		5	23		(1)
U.S. Treasury and U.S. government agency securities	—		—		—	2,991		(8)		1	2,991		(8)
Total	$	291	$	(1)	2	$	3,090	$	(10)	12	$	3,381	$	(11)

The Company has evaluated the investment securities in the above tables and has determined that the decline in their fair value is temporary. The unrealized losses are primarily due to changes in market interest rates and spreads in the market for mortgage-related products. The fair value of these securities is expected to recover as the securities approach their maturity dates and/or as the pricing spreads narrow on mortgage-related securities. The Company has the ability and the intent to hold the investments until the fair value of these securities recovers. Additional deterioration in market and economic conditions related to the COVID-19 pandemic may, however, have an adverse impact on credit quality in the future and result in OTTI charges.

The Company bifurcates OTTI into (1) amounts related to credit losses which are recognized through earnings and (2) amounts related to all other factors which are recognized as a component of other comprehensive income (loss).

To determine the component of the gross OTTI related to credit losses, the Company compared the amortized cost basis of the OTTI security to the present value of its revised expected cash flows, discounted using its pre-impairment yield. The revised expected cash flow estimates for individual securities are based primarily on an analysis of default rates, prepayment speeds and

third-party analytic reports. Significant judgment by management is required in this analysis that includes, but is not limited to, assumptions regarding the collectability of principal and interest, net of related expenses, on the underlying loans.

The following table presents a summary of the significant inputs utilized to measure management’s estimates of the credit loss component on OTTI securities as of September 30, 2020, 2019 and 2018:


	Range				Weighted
	Minimum		Maximum		Average
September 30, 2020
Constant prepayment rate	6.00	%	15.00	%	8.97	%
Collateral default rate	2.17	%	27.39	%	14.37	%
Loss severity rate	—	%	11.27	%	2.87	%

September 30, 2019
Constant prepayment rate	6.00	%	15.00	%	10.67	%
Collateral default rate	3.00	%	19.70	%	10.40	%
Loss severity rate	—	%	10.59	%	4.07	%

September 30, 2018
Constant prepayment rate	6.00	%	15.00	%	12.91	%
Collateral default rate	—	%	10.42	%	5.03	%
Loss severity rate	—	%	75.00	%	37.25	%


	2020		2019		2018
	Held To Maturity		Held To Maturity		Held To Maturity
Total recoveries	$	120	$	71	$	73
Adjustment for portion of OTTI transferred from other comprehensive income (loss) before income taxes (1)	—		(12)		(5)
Net recoveries recognized in earnings (2)	$	120	$	59	$	68

The following table presents a roll forward of the credit loss component of held to maturity and available for sale debt securities that have been written down for OTTI with the credit loss component recognized in earnings for the years ended September 30, 2020, 2019 and 2018 (dollars in thousands):


	2020		2019		2018
Balance, beginning of year	$	1,071	$	1,153	$	1,301

Additions:

Additional increases to the amount related to credit loss for which OTTI was previously recognized	3		13		14
Subtractions:
Realized losses previously recorded as credit losses	(66)		(23)		(80)
Recovery of prior credit loss	(123)		(72)		(82)
Balance, end of year	$	885	$	1,071	$	1,153

During the year ended September 30, 2020, the Company recorded a $66,000 net realized loss (as a result of investment securities being deemed worthless) on nineteen held to maturity investment securities, all of which had been recognized previously as a credit loss. During the year ended September 30, 2019, the Company recorded a $23,000 net realized loss (as a result of investment securities being deemed worthless) on seventeen held to maturity investment securities, all of which had been recognized previously as a credit loss. During the year ended September 30, 2018, the Company recorded an $80,000 net realized loss (as a result of investment securities being deemed worthless) on sixteen held to maturity investment securities, all of which had been recognized previously as a credit loss.

The recorded amount of investment securities pledged as collateral for public fund deposits, federal treasury tax and loan deposits and FHLB collateral totaled $81,028,000 and $18,587,000 at September 30, 2020 and 2019, respectively.

The contractual maturities of debt securities at September 30, 2020 are as follows (dollars in thousands). Expected maturities may differ from scheduled maturities due to the prepayment of principal or call provisions.


	Held to Maturity				Available for Sale
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due within one year	$	—	$	—	$	831	$	830
Due after one year to five years	126		130		3,270		3,261
Due after five years to ten years	7,157		7,937		18,507		18,491
Due after ten years	20,607		21,760		35,189		35,325
Total	$	27,890	$	29,827	$	57,797	$	57,907