(4)Securities

The amortized cost and approximate fair value of securities as of December 31, 2019 and 2018 are as follows:


	December 31, 2019
			Gross	Gross
	Amortized		unrealized	unrealized	Fair
(dollars in thousands)	cost		gains	losses	value
Securities available-for-sale:
U.S. asset backed securities	$	11,967	—	(101)	11,866
U.S. government agency mortgage-backed securities		5,457	66	(26)	5,497
U.S. government agency collateralized mortgage obligations		35,096	300	(173)	35,223
State and municipal securities		6,354	—	(84)	6,270
Total securities available-for-sale	$	58,874	366	(384)	58,856
Securities held to maturity:
State and municipal securities		8,780	223	—	9,003
Total securities held-to-maturity	$	8,780	223	—	9,003


	December 31, 2018
			Gross	Gross
	Amortized		unrealized	unrealized	Fair
(dollars in thousands)	cost		gains	losses	value
Securities available-for-sale:
U.S. government agency mortgage-backed securities	$	24,092	45	(271)	23,866
U.S. government agency collateralized mortgage obligations		14,754	52	(142)	14,664
State and municipal securities		11,096	22	(199)	10,919
Investments in mutual funds		1,000	—	(21)	979
Total securities available-for-sale	$	50,942	119	(633)	50,428
Securities held to maturity:
U.S. Treasuries	$	1,991	—	(13)	1,978
State and municipal securities		10,750	17	(90)	10,677
Total securities held-to-maturity	$	12,741	17	(103)	12,655

At December 31, 2019, the Corporation had an investment in mutual funds with a fair value of $1 million. At December 31, 2019, the Corporation had nine U.S. asset backed securities, one U.S. Government sponsored agency mortgage‑backed security, fifteen U.S. Government sponsored agency collateralized mortgage obligations, and six State and municipal securities in unrealized loss positions. At December 31, 2018, the Corporation had two U.S. Treasuries, twenty-four U.S. Government sponsored agency mortgage-backed securities, twelve U.S. Government sponsored agency collateralized mortgage obligations, twenty-six State and municipal securities, and one mutual fund in realized loss positions. As of December 31, 2019, the temporary impairment is primarily the result of changes in market interest rates subsequent to purchase and the Corporation did not intend to sell these securities prior to recovery and it is more likely than not that the Corporation will not be required to sell these securities prior to recovery to satisfy liquidity needs, and therefore, no securities are deemed to be other‑than‑temporarily impaired.

As of December 31, 2019 and 2018, securities having a fair value of $19.5 million and $20.6 million, respectively, were specifically pledged as collateral for public funds, the FRB discount window program, FHLB borrowings and other purposes. The FHLB has a blanket lien on non-pledged, mortgage-related loans and securities as part of the Corporation’s borrowing agreement with the FHLB.

The following table shows the Corporation’s investment gross unrealized losses and fair value aggregated by investment category and length of time that individual securities have been in continuous unrealized loss position at December 31, 2019 and 2018:


	December 31, 2019
	Less than 12 Months			12 Months or more		Total
	Fair		Unrealized	Fair	Unrealized	Fair	Unrealized
(dollars in thousands)	value		losses	value	losses	value	losses
Securities available-for-sale:
U.S. asset backed securities	$	11,866	(101)	—	—	11,866	(101)
U.S. government agency mortgage-backed securities		—	—	1,636	(26)	1,636	(26)
U.S. government agency collateralized mortgage obligations		16,283	(116)	3,108	(57)	19,391	(173)
State and municipal securities		6,270	(84)	—	—	6,270	(84)
Total securities available-for-sale	$	34,419	(301)	4,744	(83)	39,163	(384)


	December 31, 2018
	Less than 12 Months			12 Months or more		Total
	Fair		Unrealized	Fair	Unrealized	Fair	Unrealized
(dollars in thousands)	value		losses	value	losses	value	losses
Securities available-for-sale:
U.S. government agency mortgage-backed securities	$	2,354	(6)	15,223	(265)	17,577	(271)
U.S. government agency collateralized mortgage obligations		2,636	(14)	5,620	(128)	8,256	(142)
State and municipal securities		957	(11)	8,746	(188)	9,703	(199)
Investments in mutual funds		980	(21)	—	—	980	(21)
Total securities available-for-sale	$	6,927	(52)	29,589	(581)	36,516	(633)
Securities held-to-maturity:
U.S. Treasuries	$	—	—	1,978	(13)	1,978	(13)
State and municipal securities		1,545	(5)	4,783	(85)	6,328	(90)
Total securities held-to-maturity	$	1,545	(5)	6,761	(98)	8,306	(103)

The amortized cost and carrying value of securities at December 31, 2019 and 2018 are shown below by contractual maturities. Actual maturities may differ from contractual maturities as issuers may have the right to call or repay obligations with or without call or prepayment penalties.


	December 31, 2019					December 31, 2018
	Available-for-sale			Held-to-maturity		Available-for-sale			Held-to-maturity
	Amortized		Fair	Amortized	Fair	Amortized		Fair	Amortized	Fair
(dollars in thousands)	cost		value	cost	value	cost		value	cost	value
Investment securities:
Due in one year or less	$	—	—	—	—	$	906	902	1,991	1,978
Due after one year through five years		—	—	4,242	4,311		1,236	1,226	3,154	3,148
Due after five years through ten years		1,329	1,324	4,538	4,692		6,411	6,290	7,596	7,529
Due after ten years		16,992	16,812	—	—		2,543	2,501	—	—
Subtotal		18,321	18,136	8,780	9,003		11,096	10,919	12,741	12,655
Mortgage-related securities		40,553	40,720	—	—		38,846	38,530	—	—
Mutual funds with no stated maturity		—	—	—	—		1,000	979	—	—
Total	$	58,874	58,856	8,780	9,003	$	50,942	50,428	12,741	12,655

Proceeds from the sale of available for sale investment securities totaled $24.6 million for the year ended December 31, 2019. Net gain on sale of available for sale securities totaled $165 thousand for the year ended December 31, 2019. There were no sales of available for sale securities for the year ended December 31, 2019.