March 4 (Reuters) - Wall Street's main indexes fell on

Tuesday, with the Nasdaq Composite index dropping more than 10%

from its all-time high, as chipmaker Nvidia ( NVDA ) extended its recent

slump on concerns about AI spending, while worries of a global

trade war also weighed.

The tech-heavy index dropped over 1% to 18,125.54

points, a drop of more than 10% from its recent closing high of

20,173.89 hit on December 16. If it closes 10% or more below

this level, it would confirm a correction based on a widely used

definition.

At 09:38 a.m. ET, the Dow Jones Industrial Average

fell 394.50 points, or 0.91%, to 42,796.74, the S&P 500

lost 40.78 points, or 0.70%, to 5,808.94 and the Nasdaq

Composite lost 86.90 points, or 0.47%, to 18,263.29.