Investments

Investments were as follows:



	At December 31,
(In thousands)	2018		2017
Federal Home Loan Bank stock, at cost	$	54,019	$	45,021
Federal Reserve Bank stock, at cost	37,635		37,623
Total investments	$	91,654	$	82,644

The investments in Federal Home Loan Bank ("FHLB") stock are required investments related to TCF's membership in and current borrowings from the FHLB of Des Moines. TCF's investments in the FHLB of Des Moines could be adversely impacted by the financial operations of the Federal Home Loan Banks and actions of their regulator, the Federal Housing Finance Agency. The amount of Federal Reserve Bank stock that TCF Bank is required to hold is based on TCF Bank's capital structure. TCF periodically evaluates investments for other than temporary impairment. There was no impairment of these investments in 2018, 2017 and 2016.

The yield on these investments, which have no stated contractual maturity, was 4.34% and 2.96% at December 31, 2018 and 2017, respectively.