By Rex Crum, MarketWatch

SAN FRANCISCO (MarketWatch) -- Tech stocks showed signs of life Tuesday as the sector prepared for an onslaught of earnings reports, beginning with semiconductor giant Intel Corp., after the close of trading.

Intel (INTC) shares rose more than 3%, to $32.51 in advance of the chip leader's third-quarter results. Analysts surveyed by FactSet expect Intel to report a profit of 65 cents a share on $14.45 billion in revenue for the period ended in September.

Netflix Inc. (NFLX), which reports its third-quarter results after Wednesday's market close, was up by $1.55 a share at $440.10.

Other gains came from Pandora Media Inc. (P), Oracle Corp. (ORCL), Amazon.com Inc. (AMZN) and online travel agency Orbitz Worldwide Inc. (OWW), which rose 3% to $7.65 after having its rating upgraded to outperform from market perform by FBR Capital Markets analyst Jake Fuller.

Apple Inc. (AAPL) rose 10 cents a share to $99.88 in advance of a company event Thursday that is expected to focus on the release of new iPads

Alibaba Group (BABA) shed 1.2% to slip to $84.17 a share. However, UBS analyst Erica Werkun initiated her coverage of the Chinese Internet company with a buy rating and $100-a-share price target.

The Nasdaq Composite Index (RIXF) rose 23 points to 4,236 and the Philadelphia Semiconductor Index (SOX) added 1.7%.

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