"The Fed has talked itself into a deeper conundrum and need to raise because if they don't, it shows a lack of faith in the US economy," according to Andres, adding that if the central bank does tighten, subsequent hikes will be very gradual.
Separately, a Commerce Department report showed said construction spending rose 1.0 percent to a seasonally adjusted $1.11 trillion rate, the highest level since December 2007.
US Treasuries rose, pushing yields five basis points lower to 2.16 percent.
"The Fed is still likely to lift off in two weeks time, but, with this perception of slowing growth, the market is pricing in an even slower projection of raising rates and inflation," Tom Simons, a government-debt economist in New York at Jefferies Group, a primary dealer, told Bloomberg.
Wall Street also advanced. In 11.41am trading in New York, the Dow Jones Industrial Average rose 0.51 percent. In 11.26am trading, the Standard & Poor's 500 Index gained 0.59 percent, while the Nasdaq Composite Index added 0.54 percent.
Gains in shares of Pfizer and Chevron, last trading 1.4 percent and 1.1 percent higher respectively, led the Dow higher.
In Europe, the Stoxx 600 Index ended the session with a 0.3 percent fall from the previous close. France's CAC 40 Index slid 0.9 percent, while Germany's DAX Index dropped 1.1 percent.
The UK's FTSE 100 Index rose 0.6 percent, bolstered by bank stocks after the Bank of England said all seven major lenders passed so-called stress tests.
"Bank executives must be breathing a sigh of relief," Simon Goldsmith, head of risk solutions at SAS UK & Ireland, told Reuters. "It is reassuring for consumers and financial authorities to recognise that the industry has tightened up how it conducts its business."