South Korean firms' business sentiment worsened in December due to the resurgence of COVID-19.

According to the Bank of Korea on Wednesday, the business survey index(BSI) for all industries came to 75, down three points from the previous month. 

A reading below 100 means pessimists outnumber optimists.    

The index jumped ten points to 74 in October and climbed to 78 in November, but the rising streak snapped in December due to the resurgence of coronavirus infections.

The index for manufacturers slipped three points on-month to 82, while the BSI for non-manufacturers, which includes restaurants, wholesale and retail businesses, fell five points to 68.