Shares in General Motors (GM) have risen 3.6% on the first day of trading following the carmaker's record public share offering.
Shares closed at $US34.19 in New York from a start of $US33, although they did reach a high of $US35.60 during the day.
GM is returning to the market after a $US50 billion bail-out by the federal government.
It has raised $US20.1 billion from the sale of the shares, making it the largest share sale in the US to date.
However, an over-allotment option, which will be settled over the next 30 days, would add $US3 billion to that figure.
The share sale, known as an initial public offering (IPO), will allow the US government to reduce its current 61% stake in the company to 33%.