June 4 (Reuters) - Wall Street's main indexes inched

down on Tuesday as concern grew about the health of the world's

largest economy, even as investors eyed key economic data due

this week for clues on how much growth has slowed.

The Dow Jones Industrial Average fell 52.17 points,

or 0.14%, at the open to 38,518.86.

The S&P 500 opened lower by 5.16 points, or 0.10%, at

5,278.24, while the Nasdaq Composite dropped 4.79

points, or 0.03%, to 16,823.88 at the opening bell.