Foreign investors posted net selling in the Seoul bourse last year for the first time since the stock market opened to foreigners.
Foreign investors have been net buyers in the local bourse throughout this month, buoying sentiment and boosting trading volume.
The local bourse did not open Wednesday for fear that investor panic in the wake of Tuesday's attacks would wreak havoc on the already depressed markets.
But the Korean bourse boasts a dubious distinction: It has less local investment than almost any other major market.
But with investors moving money across national borders more easily than ever, the movements of stocks in one country are being felt more quickly in bourses worldwide.
The threat of war pummeled Asian stock markets on Friday, with some bourses sinking to levels not seen since the Asian economic crisis.
If the exercises get too threatening, that could send Asian markets into paroxysms - just when the region's bourses are giving up gains from earlier this year.
Many European bourses dropped to five-year lows and the Nasdaq came close to five-year lows.
And a deal signed in June by the Malaysian and Singaporean bourses will make it easier for portfolio investors from either side of the border to trade stocks in both countries.
Not all emerging-market bourses did badly in the last year.