Wall St starts flat near 2 1/2-year highs
China's central bank raised interest rates by 25 basis points in a bid to tame inflation.
The Dow Jones industrial average was down 1.59 points, or 0.01 percent, at 12,160.04. The Standard & Poor's 500 Index was down 0.78 point, or 0.06 percent, at 1,318.27. The Nasdaq Composite Index was down 3.44 points, or 0.12 percent, at 2,780.55.
(Reporting by Angela Moon, Editing by Kenneth Barry)