Answer: Amortized cost.
Explanation: Debt securities or bonds may be purchased for different intent. When debt securities are purchased for the short term, that is those which are liquidated within a short period of term usually called available for sale. On the other hand debt securities may be purchased with the intention of keeping for the long term called Held-to - maturity which is the case with Kale Co. as stated in the scenario above. Bonds which are liquidated in the short term are reported at fair value while those which are held till maturity are are adjusted for amortization of premium or discount as the case may be during these period and are hence accounted for at Amortized cost.