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* Futures down: Dow 0.65%, S&P 500 0.76%, Nasdaq 1.17%

June 10 (Reuters) - U.S. stock index futures fell on

Wednesday as technology stocks extended losses, while renewed

tensions between the U.S. and Iran weighed on sentiment ahead of

a key inflation report.

Volatility has picked up across stock markets in recent

days, as investors contend with a widening array of risks,

including high valuations in the tech sector, escalating

tensions in the Middle East and expectations that the Federal

Reserve may need to hike interest rates to curb inflation.

Nvidia ( NVDA ), Broadcom ( AVGO ) and Micron Technology ( MU )

fell between 2% and 3.6% in premarket trading, with

losses picking up again after a brief rebound on Monday.

Technology and AI stocks retreated steeply on Friday as

Broadcom's ( AVGO ) disappointing outlook fueled concerns over stretched

valuations in chipmakers.

"The tech sector is coming under pressure from a combination

of higher rate expectations, which lowers the current value of

more distant profits, and anxiety over elevated valuations and

uncertainties over the monetization of AI," said Mark Haefele,

chief investment officer at UBS Global Wealth Management.

"Investors' positioning in parts of the sector may have also

become extended after a strong rally."

At 05:29 a.m. ET, Dow E-minis were down 329 points,

or 0.65%, and S&P 500 E-minis were down 56 points, or

0.76%. Nasdaq 100 E-minis were down 340.25 points, or

1.17%.

The U.S. military carried out strikes on Iranian targets

after President Donald Trump vowed to retaliate against the

downing of a U.S. Apache attack helicopter - marking a fresh

escalation that risks unraveling the fragile ceasefire between

Washington and Tehran.

Oil prices were largely unchanged, with Brent crude

trading above $91 a barrel.

Attention now turns to May consumer price data, due at 8:30

a.m. ET. The report will be closely watched for clues on how

rising energy costs, due to the Iran conflict, are feeding into

inflation, especially after last week's hotter-than-expected

jobs report fueled concerns about potential Fed rate hikes.

The CPI likely increased 4.2% in the 12 months through May,

according to a Reuters survey of economists. That would be the

largest annual rise since April 2023 and would follow a 3.8%

advance in April.

The much-hyped $1.75 trillion listing of SpaceX on

Friday, targeting a record $75 billion raise, could also

pressure U.S. stocks as concerns mount over excessive optimism

in the tech sector.

Among other movers, Super Micro Computer ( SMCI ) fell 8.5%

after announcing plans to raise $7 billion through a series of

equity and equity-linked financing transactions to fund

component purchases for its growing AI server demand.

Nike's ( NKE ) shares were down 1.6% after RBC downgraded

the stock rating to "sector perform" from "outperform".

(Reporting by Joel Jose in Bengaluru; Editing by Shinjini

Ganguli)