The following table presents, by type and number of securities, the age of gross unrealized losses and fair value by investment category for securities available for sale as of the dates presented (dollars in thousands): The following table presents, by type and number of securities, the age of gross unrealized losses and fair value by investment category for securities held to maturity as of the dates presented (dollars in thousands): INVESTAR HOLDING CORPORATION Notes to Consolidated Financial Statements The unrealized losses in the Bank’s investment portfolio, caused by interest rate increases, are not credit issues.