The South Korean stock market was down more than two percent by the middle of Tuesday's session, reaching its lowest point in thirteen months.
Investors are watching factors such as the tensions in Ukraine and the meeting at the Federal Reserve this week and what the Fed decides to do with interest rates as inflation soars.
Another factor is volatility in the global markets.
The U.S. stocks on Monday were on track for their worst day in almost a year and a half as the Dow plunged a thousand points but then rebounded later in the day.
The Dow finished with a gain of 0.3 percent, as did the S&P 500, and the Nasdaq was up zero.six percent.
European markets, though, did not recover and closed deep in the red.
The DAX in Frankfurt plunged 3.8 percent to hit a new 3-month low, while the CAC 40 in France fell by even more at 3.9-7 percent.
In London, the FTSE 100 was off more than 2.6 percent.
Some analyst say that this could be a crucial week for the markets.
Geopolitical risks are increasing on the Ukraine-Russia border, the FOMC meets for the first time this year on Tuesday, U.S. eastern time.
Investors will be closely watching what the Fed says in terms of tapering its asset purchases or raising rates, with any sign of a more aggressive policy likely to lead the markets lower.
Lee Eunjin, Arirang News.