March 25 (Reuters) - Wall Street's main indexes kicked

off the holiday-shortened week lower on Monday, as investors

looked ahead to commentary from Federal Reserve officials and

key inflation data, while Boeing ( BA ) gained after the planemaker

said its CEO would be stepping down.

The Dow Jones Industrial Average fell 65.36 points,

or 0.17%, at the open, to 39,410.54.

The S&P 500 opened lower by 14.66 points, or 0.28%,

at 5,219.52, while the Nasdaq Composite dropped 93.52

points, or 0.57%, to 16,335.30 at the opening bell.