Asian shares gain, with South Korea's Kospi up 6%, after the US Treasury expands its debt buybacks

Asian shares advanced on Thursday, with South Korea's Kospi jumping over 6%, following U.S. futures gains. The surge was linked to the U.S. Treasury Department announcing it would double planned purchases of longer-term government debt, causing bond yields to fall. Other major indexes such as Japan’s Nikkei 225 and Hong Kong’s Hang Seng also reported gains.