(Recasts with preliminary close of trading)

* Chips resume selloff after short-lived bounce on Monday

* Consumer price data, SpaceX market debut on watch this

week

* Trump writes on social media that Iran had shot down a US

Apache helicopter

By Caroline Valetkevitch and Twesha Dikshit

June 9 (Reuters) - The S&P 500 and Nasdaq indexes fell on

Tuesday as a rebound in technology shares faded and as President

Donald Trump said the U.S. must react to Iran's shooting down of

a U.S. helicopter.

Trump wrote in a social media post that Iran had shot down the

U.S. Apache helicopter that was patrolling the Strait of Hormuz

overnight, and vowed to respond, which added to doubts about

prospects for a truce in the Middle East war.

The Cboe Volatility Index hit its highest level since

April 7 during the session as stocks sold off.

Technology stocks resumed Friday's selloff following a

bounce on Monday. The S&P 500 tech index fell more

than 4% before paring losses. The Philadelphia SE Semiconductor

Index dropped as much as 8.6% after rising 3% in early

trading.

"When the bounce ran its course this morning, the tape came

for sale more broadly. There's also a rotation going on ... so

part of it is more of a momentum unwind," said Michael O'Rourke,

chief market strategist at JonesTrading in Stamford,

Connecticut.

The Russell 1000 value index outperformed the growth

index.

Trump's post also briefly "created another leg down,"

O'Rourke said.

In addition, investors may be worried ahead of inflation data

and a highly anticipated SpaceX IPO later this week.

According to preliminary data, the S&P 500 lost 20.25

points, or 0.27%, to end at 7,385.48 points, while the Nasdaq

Composite lost 254.47 points, or 0.98%, to 25,675.19.

The Dow Jones Industrial Average rose 84.28 points, or

0.14%, to 50,857.58.

Consumer price data for May could offer fresh clues on how the

rise in energy prices, driven by the Iran war, is impacting

inflation. The data is due on Wednesday.

SpaceX's market debut on Friday could also be a hurdle for U.S.

stocks as investors worry about possible overexuberance among

high-growth technology stocks. Elon Musk's SpaceX is aiming to

raise $75 billion and targeting a valuation of $1.75 trillion,

the most ever for an IPO.

Some strategists have said investors are potentially booking

profits in the high-flying semiconductor stocks to make room for

SpaceX in their portfolios.

Technology and AI-linked stocks sold off sharply on Friday

after Broadcom's ( AVGO ) disappointing forecast fueled concerns

about high valuations in the sector, particularly in chipmakers,

which have rallied sharply this year. The semiconductor index

remains up more than 70% for the year so far.