South Korea had a current account surplus of $2.68 billion in January, the Bank of Korea said on Tuesday.
That followed the $4.09 billion surplus in December.
The goods account surplus widened slightly to $8.11 billion compared to the $7.73 billion surplus for January 2017.
The services account deficit increased to $4.49 billion from $3.34 billion in January of last year, owing to a deterioration in the travel account.
The primary income account surplus narrowed from $1.18 billion one year earlier to a $0.68 billion surplus in January 2018, in line with a widened deficit in the compensation of employees account.
The secondary income account showed a $1.61 billion deficit.
In the financial account there was an overall $4.11 billion increase in net assets in January.
Direct investment assets grew by $1.40 billion, and direct investment liabilities by $1.26 billion.
A $10.57 billion increase in portfolio investment assets was recorded during the month, and a $7.08 billion expansion in portfolio investment liabilities.
Financial derivatives posted a net contraction of $1.29 billion.
In terms of other investment, there were increases of $2.82 billion in assets and $2.49 billion in liabilities.
Reserve assets grew by $1.44 billion.