Wall Street gains broadened overnight after minutes from the latest US Federal Reserve meeting showed policy makers' concern sluggish economies overseas and an appreciation of the greenback will weigh on US growth, suggesting the central bank might not raise interest rates as soon as expected.
"A number of participants noted that economic growth over the medium term might be slower than they expected if foreign economic growth came in weaker than anticipated, structural productivity continued to increase only slowly, or the recovery in residential construction continued to lag," according to minutes from the Fed Open Market Committee's meeting on September 16-17.
Policy makers also expressed concern about the impact of an ongoing strengthening of the US currency.
"The persistent shortfall of economic growth and inflation in the euro area could lead to a further appreciation of the dollar and have adverse effects on the US external sector," the minutes showed. "Slower economic growth in China or Japan or unanticipated events in the Middle East or Ukraine might pose a similar risk."
"The appreciation of the dollar might also tend to slow the gradual increase in inflation toward the FOMC's 2 per cent goal."