SAN FRANCISCO Tech stocks scored broad gains in early trading Friday, with data-analytics technology company Splunk Inc. up by more than 16% at $ 35.40 a share, and digital-imaging company OmniVision Technologies Inc. rising more than 7%, to $ 17.03. Both companies reported upbeat quarterly results late Thursday. Gains also came from Apple Inc. , Microsoft Corp. and eBay Inc. . The Nasdaq Composite Index rose more than 17 points to 3,066.

