The United States Treasury's large-scale bond buy-back program helped boost the stock market, with the dollar devalued to three months low. Points

The decision of the United States Treasury Department to increase the scale of long-term bond buy-backs to at least $4 billion, more than the previous $2 billion, was considered a major policy initiative this week. This policy led to a 30-year sovereign debt return of 8 to 9 basis points within hours of the announcement, the depreciation of the United States dollar to a three-month low and the rise of the stock market due to the debt market rebound. The Dow Jones industry average index and the Standard & Poor ' s 500 index increased by about 0.2 per cent, while the NASDAQ composite index rose by about 0.16 per cent. At the same time, Moderna ' s share price rose by 176 per cent as a result of the positive test results of its joint development with Merk of a melanoma vaccine。