SEOUL –

President Park Geun-hye on Monday ordered officials to take "all necessary measures" — including round-the-clock monitoring — to minimize market fallout after Britain's decision to exit the European Union, Yonhap news agency reported.

The U.K. vote Thursday wiped trillions of dollars off world stock markets Friday and caused currencies to swing violently.

"Along with the 24-hour monitoring system that is currently in place, I direct you to take all necessary measures to stabilize the market and minimize the fallout on our economy," Park told advisers, Yonhap said.

She also stressed the need to strengthen international cooperation to stabilize global markets, adding that the nation's fundamentals are strong enough to cope with the shock.

"Currently, our country's fiscal soundness is high enough to respond to the shock on the market," Yonhap quoted her as saying. "Thus, we should make active efforts to publicize our country's capabilities."

Meanwhile, in the wake of North Korea's successful test Wednesday of a medium-range ballistic missile, Park urged against internal division.

"When a country faces a national crisis, the most frightening issue is internal division and apathy," she said, according to Yonhap. "When South Vietnam fell down in the past, the biggest cause was internal division."

Park added: "We should ward off those who are sowing division here and siding with North Korea."

It was unclear if she was referring to lawmakers who have challenged the legality of Seoul giving protection to a group of North Korean defectors, whom Pyongyang alleges the South kidnapped.

Japan's military said the missile — through to be a Musudan — reached an altitude of 1,000 km (over 600 miles), making the test an apparent success.

Five earlier Musudan launches ended in failure when the missiles exploded or fell into the ocean shortly after being launched.