Major U.S. stock-indexes mixed on Monday, led by tech stocks such as Apple and Google-parent Alphabet, but a drop in oil prices weighed on energy stocks.

Oil prices fell about 3,8% due to an increase in OPEC production and U.S. oil rig additions. Growth in U.S. gross domestic product in the second quarter unexpectedly remained tepid and came in below expectations. Data on Monday showed U.S. manufacturing activity slowed in July as orders fell broadly and construction spending dropped in June.

Most of Dow stocks in negative area (20 of 30). Top gainer - Wal-Mart Stores Inc. (WMT, +1.21%). Top looser - Exxon Mobil Corp. (XOM, -3.11%).

S&P sectors mixed. Top gainer - Conglomerates (+1.9%). Top looser - Basic Materials (-2.2%).

At the moment:

Dow 18307.00 -55.00 -0.30%

S&P 500 2163.25 -5.00 -0.23%

Nasdaq 100 4741.25 +14.50 +0.31%

Oil 40.02 -1.58 -3.80%

Gold 1359.50 +2.00 +0.15%

U.S. 10yr 1.49 +0.03