Asian equity markets rose Thursday after the U.S. Treasury announced it would at least double the size of its planned longer-term government-debt buybacks [2].

The move signals a shift in U.S. fiscal management that investors believe will increase global liquidity. This change in debt handling often encourages a higher risk appetite among traders in international markets.

South Korea's benchmark Kospi index saw the most significant reaction to the news. The index rose more than six percent [1]. This surge reflects a broader trend of gains across Asian shares as markets processed the Treasury's decision.

The U.S. Treasury's commitment to at least double [2] its planned purchases of longer-term debt is intended to stabilize government borrowing costs. By buying back existing debt, the Treasury can manage the maturity profile of the national debt more effectively.

Investors in Hong Kong and other regional hubs reacted positively to the announcement. The expansion of the buyback program is viewed as a supportive measure for the broader financial ecosystem, providing a cushion against volatility in the bond market.

Market analysts said that the decision directly impacts how capital flows into emerging markets. When the U.S. Treasury takes an active role in supporting the debt market, it often lowers the perceived risk for equities in Asia.

South Korea's Kospi index rose more than 6%

The U.S. Treasury's decision to aggressively expand debt buybacks reduces the duration of government debt, which can lower the volatility of long-term interest rates. For Asian markets, particularly South Korea, this creates a more stable environment for foreign investment and increases the availability of liquidity, leading to the sharp equity gains observed this week.