The Standard & Poor's 500 Index crept to a fresh intraday record high as investors await the second estimate of US economic performance in the first quarter, scheduled to be released tomorrow.
A preliminary estimate showed the US economy had expanded at a 0.1 per cent annualised rate in the first three months of 2014, but economists predict the second estimate might show it shrank.
Recent economic data have indicated the world's largest economy is performing better than anticipated, while the US Federal Reserve has indicated it is in no rush to raise interest rates. Those factors have helped underpin both Wall Street and US Treasuries.
In the final hour of trading in New York, the S&P 500 was up 0.08 per cent at 1,913.36, after touching a record high 1,914.46 earlier in the session.
"We made a pretty decisive move above 1,900" on the S&P 500, Jim Paulsen, chief investment officer of Wells Capital Management in Minneapolis, told Reuters. "Economic momentum is clearly to the upside at the moment."