South Korean firms' business sentiment slightly worsened this month.

According to the Bank of Korea on Wednesday, the business survey index(BSI) for all industries came to 76 in February, down one point from the previous month. 

The drop comes after an on-month rise of two points in January. 

A reading below 100 means pessimists outnumber optimists.    

The index for manufacturers slipped three points on-month to 82, while the BSI for non-manufacturers, which includes restaurants, wholesale and retail businesses, gained two points to 72.