Koreans hold the third most welcome passport in the world, going by a handy index from an investment firm.

The Passport Index updated by Arton Capital on Wednesday estimated that Singapore has the "most powerful" passport out of 199 countries with the highest visa-free score of 159.

This is the first time an Asian country has taken the top spot on the index. The firm ranks passports on the basis of the number of countries they can visit visa-free or with visa on arrival.

