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Securities | 12 Months Ended
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Dec. 31, 2017
Securities |
Securities | Note 2 – Securities The following table summarizes the amortized cost and fair value of the available-for-sale investment securities portfolios at December 31, 2017 and December 31, 2016 and the corresponding amounts of unrealized gains (losses) which are recognized in accumulated other comprehensive income:
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |
|  | (In thousands) |
December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |
Federal agency mortgage-backed securities |  | $ | 11,877 |  | $ | 168 |  | $ | (37 | ) | $ | 12,008 |
Federal agency debt |  |  | 5,495 |  |  | 2 |  |  | (11 | ) |  | 5,486 |
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Total available-for-sale securities |  | $ | 17,372 |  | $ | 170 |  | $ | (48 | ) | $ | 17,494 |
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December 31, 2016: |  |  |  |  |  |  |  |  |  |  |  |  |
Federal agency mortgage-backed securities |  | $ | 11,022 |  | $ | 227 |  | $ | (35 | ) | $ | 11,214 |
Federal agency debt |  |  | 1,960 |  |  | 28 |  |  | - |  |  | 1,988 |
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Total available-for-sale securities |  | $ | 12,982 |  | $ | 255 |  | $ | (35 | ) | $ | 13,202 |
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At December 31, 2017, the Bank had three federal agency debt securities with total amortized cost and estimated total fair value of $5.5 million and an estimated average remaining life of 4.4 years. The Bank also had 26 federal agency mortgage-backed securities with total amortized cost of $11.9 million, estimated total fair value of $12.0 million and an estimated average remaining life of 4.6 years. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. At December 31, 2017 and 2016, securities pledged to secure public deposits had a carrying amount of $526 thousand and $629 thousand, respectively. At December 31, 2017 and 2016, there were no holdings of securities by any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders' equity. There were no sales of securities during the years ended December 31, 2017 and 2016. The Bank held six securities with unrealized losses at December 31, 2017, compared to three securities with unrealized losses at December 31, 2016. Securities in unrealized loss positions are analyzed as part of our ongoing assessment of other-than-temporary impairment. Consideration is given to the financial condition and near-term prospects of the issuer, the length of time and the extent to which the fair value has been less than the cost, and our intent and ability to retain our investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. All of the Bank's securities were issued by the federal government or its agencies. The unrealized losses on our available-for-sale securities at December 31, 2017 were primarily caused by movements in market interest rates subsequent to the purchase of such securities. We do not consider these unrealized losses to be other than temporary impairment.

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