SEOUL (Reuters) -South Korea's finance ministry vowed on Sunday to continue to swiftly deploy market stabilising measures as needed to support the economy after President Yoon Suk Yeol was impeached over his brief imposition of martial law.

The ministry said it will actively communicate with the parliament to keep the economy stable, adding that it plans to announce its biannual policy plan before the end of this year.

The leader of the main opposition Democratic Party, Lee Jae-myung, called for a National Stability Council for Governance comprising the government and parliament to discuss finance, economy and public livelihoods.

The Bank of Korea said in a statement that it would use all available policy instruments in conjunction with the government to respond to and avert any escalation of volatility in financial and foreign exchange markets.

The bank said it is necessary to respond more actively to the economic impact than in past presidential impeachment periods due to heightened challenges in external conditions, such as increased uncertainty in the trading environment and intensified global competition in key industries.

South Korea's financial regulator said in a statement that financial markets are expected to stabilise as recent political events are considered temporary shocks, but it will expand market-stabilising funds if needed.