March 12 (Reuters) - Wall Street's main indexes opened

higher on Wednesday after data showed cooling inflation,

although concerns about the economic impact of U.S. President

Donald Trump's trade policies tempered optimism.

The Dow Jones Industrial Average rose 144.0 points,

or 0.35%, at the open to 41,577.5. The S&P 500 rose 52.8

points, or 0.95%, at the open to 5,624.84​, while the Nasdaq

Composite rose 275.3 points, or 1.58%, to 17,711.41 at

the opening bell.