July 28 (Reuters) - The Nasdaq opened lower on Tuesday,

mirroring a cautious mood across global markets toward AI chip

stocks on concerns about hefty corporate spending and rising

Chinese competition, ahead of earnings from some of the biggest

companies on Wall Street.

The Dow Jones Industrial Average rose 282.8 points,

or 0.54%, at the open to 52492.88. The S&P 500 fell 17.6

points, or 0.24%, at the open to 7395.55​, while the Nasdaq

Composite dropped 107.0 points, or 0.43%, to 24825.072

at the opening bell.