July 22 (Reuters) - The S&P 500 and the Nasdaq opened lower

on Wednesday pressured by weakness in chip stocks, as investors

remained cautious ahead of the first batch of Big Tech earnings

that could decide whether Wall Street's AI-driven rally has more

room to run.

The Dow Jones Industrial Average rose 62.5 points, or

0.12%, at the open to 52287.14. The S&P 500 fell 11.7

points, or 0.16%, at the open to 7497.47​, while the Nasdaq

Composite dropped 143.5 points, or 0.56%, to 25693.719

at the opening bell.