Other investment banks, including Goldman Sachs and JP Morgan, also anticipate that the BOK will lower the rate to 1 percent this year.

The South Korean central bank has frozen the key rate at 1.25 percent since June last year.

Experts noted that such companies are calling for more aggressive monetary intervention by the central bank, as Asia's fourth-largest economy is facing intensified uncertainties at home and abroad.

Rising trade protectionism and tensions between the world's two heavyweights of the United States and China over foreign exchange will weigh heavily on global trade and the South Korean economy, which depends highly on exports.

Moreover, the country is deeply embroiled with the political issues surrounding the impeachment of President Park Geun-hye and possible early presidential elections.

Also, massive household debt worth 1,300 trillion won has made the BOK reluctant to hike the key rate.

But, some economists said that it is not simple for the BOK to take action in the near future, as the US Federal Reserve will raise its key rate several times in 2017 on the back of the recovering pace of the world's biggest economy.

A further rate cut may lead the South Korean rate to go below the US interest rate range of 0.50-0.75 percent and consequently spark a sudden outflow of foreign capital from the local equity market. (Yonhap)