Aug 1 (Reuters) - Wall Street's main stock indexes

opened higher on Thursday, boosted by the Federal Reserve's

signals of a September rate cut and a rosy sales forecast from

Meta, although a pullback in chip stocks kept gains in check.

The Dow Jones Industrial Average rose 74.2 points, or

0.18%, at the open to 40,916.96. The S&P 500 rose 15.5

points, or 0.28%, at the open to 5,537.84​, while the Nasdaq

Composite rose 47.6 points, or 0.27%, to 17,647.032 at

the opening bell.