Bonds
Noun
こくさい
ちょうど国債を売ろうとしたところで、値が急激に下がって、売り損ねちゃったんだ。
We were on the verge of selling the government bonds, but the price rolled down too quickly and we couldn’t sell.
A country's debt is the national debt. It can also be bonds, like the ones you buy from your country.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.