US STOCKS-Wall St flat as healthcare decline counters chip boost

By Amy Caren Daniel and Sruthi Shankar

(For a live blog on the U.S. stock market, click or type LIVE/ in a news window.)

* Qualcomm surges on surprise settlement with Apple

* Healthcare stocks fall for 2nd straight day

* China's Q1 growth unexpectedly steadies

* IBM falls after revenue miss

* Dow up 0.03 pct, S&P flat, Nasdaq up 0.10 pct (Changes comment, updates prices)

By Amy Caren Daniel and Sruthi Shankar

April 17 (Reuters) - Wall Street's main indexes were trading flat on Wednesday, as a Qualcomm-led rally in chipmakers was offset by a slide in healthcare stocks for the second straight session, although quarterly earnings came in largely positive.

Qualcomm Inc surged 10.3% after the company won a major victory in its legal dispute with Apple Inc that called for the iPhone to once again use Qualcomm modem chips.

Data showed China's economy grew at a steady 6.4% pace in the first quarter, defying expectations for a further slowdown.

This helped chipmakers, which get a huge portion of their revenue from China, rally. The Philadelphia chip index jumped 1.45%.

The S&P healthcare index tumbled 2% and was on pace to wipe out its yearly gains due to ongoing concerns about potential changes to healthcare policy.

"Investors are kind of taking a step back. Q1 earnings have been fine, but there is still a decent amount of debate in the market around where do we go this year in terms of economic growth," said Mike Dowdall, a portfolio manager with BMO Global Asset Management.

"We are going to have to see earnings expectations continue to increase and an even more positive outcome from trade."

Of the 54 S&P 500 companies that have posted results so far, about 80% have beaten estimates, according to Refinitiv data.

However, analysts now expect first-quarter S&P 500 profits to drop 1.8% year-on-year. Though a solid improvement over recent estimates, it would still mark the first earnings contraction since 2016.

United Continental Holdings Inc rose 4.2% after reporting a better-than-expected jump in quarterly profit and fueled a 1.1% rise in the Dow Jones transport index.

At 11:08 a.m. ET the Dow Jones Industrial Average was up 7.04 points, or 0.03%, at 26,459.70. The S&P 500 was down 0.03 points, or 0.00%, at 2,907.03 and the Nasdaq Composite was up 7.97 points, or 0.10%, at 8,008.19.

The Nasdaq 100 touched a record intraday high, surpassing its highest level hit in early October.

Among other stocks, International Business Machines Corp fell 2.6% after reporting a bigger-than-expected drop in quarterly revenue.

Morgan Stanley rose 2% after its quarterly profit beat expectations, wrapping up earnings for big U.S. banks.

PepsiCo Inc gained 3% after its quarterly results beat Wall Street estimates.

Netflix Inc shares dipped 0.1% in volatile trading. The video streaming service provider gave a weak forecast but beat quarterly estimates.

Declining issues outnumbered advancers for a 1.01-to-1 ratio on the NYSE and for a 1.43-to-1 ratio on the Nasdaq.

The S&P index recorded 42 new 52-week highs and five new lows, while the Nasdaq recorded 56 new highs and 36 new lows. (Reporting by Amy Caren Daniel, Sruthi Shankar and Shreyashi Sanyal in Bengaluru; Editing by Sriraj Kalluvila and Arun Koyyur)