March 18 (Reuters) - Wall Street's main indexes opened

higher on Monday, with a rally in megacap growth stocks and

chipmakers supporting a sharp recovery in the tech-laden Nasdaq

ahead of the U.S. Federal Reserve's meeting this week.

The Dow Jones Industrial Average rose 112.16 points,

or 0.29%, at the open to 38,826.93.

The S&P 500 opened higher by 37.68 points, or 0.74%,

at 5,154.77, while the Nasdaq Composite gained 181.75

points, or 1.14%, to 16,154.92 at the opening bell.