April 17 (Reuters) - Wall Street's main indexes opened

higher on Wednesday bolstered by megacap growth stocks and as

more corporate earnings rolled in, while investors awaited

commentary from Federal Reserve policymakers for clues on the

state of the economy.

The Dow Jones Industrial Average rose 150.70 points,

or 0.40%, at the open to 37,949.67.

The S&P 500 opened higher by 17.56 points, or 0.35%,

at 5,068.97, while the Nasdaq Composite gained 77.03

points, or 0.49%, to 15,942.29 at the opening bell.