Meanwhile, European and Japanese stocks and U.S. stock-index futures fell early on Thursday and the U.S. dollar hit a one-month low against a basket of currencies.
This came amid growing speculation the U.S. Federal Reserve might raise interest rates either this month or next, while monetary policy remains ultra-loose at other major central banks.
South Korea's central bank cut its policy rate by 25 basis points to a record-low of 1.25 percent on Thursday. Plus, the European Central Bank launched its corporate bond-buying program on Wednesday.
"If you don't like the idea that Easy Money is a panacea for asset markets and think the Bank of Korea rate cut reflects the woes of an economy with excess savings, importing disinflation from both Japan and China and heading for economic stagnation, this might be a good time to find a rock to hide under for a while," Kit Juckes, strategist at Societe Generale, said in a note on Thursday.
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