Wall Street mixed as chip stocks tumble and energy climbs

By Noel Randewich

(Reuters) - U.S. stocks were mixed on Tuesday as a boost from the energy sector and strong consumer confidence data helped offset losses in chipmakers and utilities ahead of an expected Federal Reserve interest rate hike.

The S&P 500 energy index <.SPNY> added 0.66 percent, the most among the 11 major S&P sectors, as Brent oil hit a four-year high, boosted by imminent U.S. sanctions on Iranian exports, and OPEC and Russia's reluctance to raise output.

U.S. consumer confidence unexpectedly rose in September, lifting it closer to levels last seen in 2000, the Conference Board said, underscoring strength in the labour market and overall economy.

That pushed the S&P 500 consumer discretionary index <.SPLRCD> up 0.57 percent, making it the biggest boost to all three of Wall Street's main indexes.

"A lot of the noise around trade and anything else around politics really hasn't suppressed consumer confidence nearly to the degree that the other factors have boosted it," said Mike Dowdall, investment strategist for BMO Global Asset Management, in Chicago.

The Philadelphia semiconductor index <.SOX> dropped 1.47 percent, weighing on the S&P 500 technology index 19 percent rally.

"There are different stories for different sectors, it's a finicky little market," said Dennis Dick, a proprietary trader at Bright Trading LLC. "If you're a money manager, you have to be very careful about what you're buying."

At 2:36 p.m. ET, the Dow Jones Industrial Average was down 0.21 percent at 26,506.71 points, while the S&P 500 lost 0.11 percent to 2,916.2. The Nasdaq Composite added 0.16 percent to 8,005.99.

Financials <.SPSY>, including bank stocks <.BKX>, gave up earlier gains to trade down 0.3 percent ahead of an expected interest rate hike by the Fed on Wednesday.

"There is a bit of range in trading as people get ready for the Fed meeting," said Dowdall.

Utilities <.SPLRCU> slid 1.17 percent and consumer staples lost 0.60 percent.

Nike was up 0.8 percent ahead of its quarterly results, expected after the bell.

CenturyLink tumbled 7 percent after Chief Financial Officer Sunit Patel left the company in a surprise move to join T-Mobile US Inc to oversee its integration with Sprint .

T-Mobile rose 0.8 percent and Sprint added 0.9 percent.

Declining issues outnumbered advancing ones on the NYSE by a 1.08-to-1 ratio; on Nasdaq, a 1.17-to-1 ratio favoured advancers.

The S&P 500 posted 31 new 52-week highs and 8 new lows; the Nasdaq Composite recorded 62 new highs and 41 new lows.

(Additional reporting by Amy Caren Daniel in Bengaluru; Editing by Nick Zieminski)