The Dow Jones industrial average rose 26 points, or 0.2 per cent, to 17,104 in early trading Thursday. The Standard & Poor's 500 index climbed two points, or 0.1 per cent, to 2,002.
ECB President Mario Draghi said in a press conference that the bank would start purchases of asset-backed securities and covered bonds in October. The bank also cut its benchmark interest rate.
In the U.S., a private survey showed businesses added jobs at a healthy pace in August.
PVH, the owner of Tommy Calvin Klein and Tommy Hilfiger brands, rose $11.25, or 10 per cent, to $128.38 after the company reported earnings that exceeded analysts' expectations.