The South Korean economy has extended its recovery momentum on the back of robust exports, but the fast spread of the omicron variant is feared to constrain the recovery of private spending, the finance ministry said Friday.

External economic uncertainties also heightened as volatility in raw material prices and market fluctuations amplified due to Russia's invasion of Ukraine, the ministry said in its monthly economic assessment report, called the Green Book.

"South Korea's exports have maintained robust recovery and the number of employed people has increased. But the spread of the omicron variant is feared to hamper the recovery of domestic demand," the report said.

Asia's fourth-largest economy is on a recovery track, but it faces growing downside risks amid the upsurge in COVID-19 cases and the Ukraine crisis.

South Korea's daily virus cases exceeded 600,000 for the first time Thursday as the omicron variant is fast spreading amid an easing of virus curbs.

The report showed sales at department stores and card spending increased last month on-year, but their growth slowed down from January amid the omicron wave.

Card spending went up 7.6 percent on-year last month, marking the 13th straight month of gains. The tally slowed from a 17.5 percent gain in January.

Sales at department stores increased 5.9 percent on-year after growing 31.5 percent in January. Domestic sales of autos rose 1 percent in February, a turnaround from a 19.7 percent fall the previous month.

The Ukraine conflict and ensuing global sanctions against Russia drove up already high oil prices, putting upward pressure on inflation.

South Korea's consumer prices grew 3.7 percent on-year in February, marking the fifth straight month that inflation has grown more than 3 percent, amid surging energy costs. South Korea heavily relies on imports for most of its energy needs.

Global credit appraiser Moody's Investors Service on Thursday cut its 2022 growth outlook for the South Korean economy to 2.7 percent from its earlier estimate of 3 percent, citing the economic fallout of the Ukraine crisis.

The Bank of Korea expects the Korean economy to grow 3 percent this year after a 4 percent expansion last year. (Yonhap)