(For a Reuters live blog on U.S., UK and European stock

markets, click or type LIVE/ in a news window.)

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Futures: Dow down 0.05%, S&P 500 up 0.12%, Nasdaq up 0.26%

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Tax bill sent to Senate

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Snowflake shines after raising revenue forecast

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Solar stocks fall on fears of green-energy subsidies

ending

(Updates with analyst comment, prices)

By Shashwat Chauhan and Kanchana Chakravarty

May 22 (Reuters) - U.S. stock index futures were subdued

in volatile trading on Thursday after the U.S. House of

Representatives passed President Donald Trump's tax bill, which

is expected to burden the country with trillions in debt, by a

razor-thin margin.

If the bill becomes law, it is expected to add about

$3.8 trillion to the federal government's $36.2 trillion debt in

the next decade, according to the nonpartisan Congressional

Budget Office.

The

bill

now faces a test in the Republican-controlled Senate and

will fulfill much of Trump's populist agenda if passed,

delivering new tax breaks on tips and car loans and boosting

military spending.

"The fact that it got through the House will be a sign

potentially of stability rather than more uncertainty," said

Christopher Peters, head of trading at Accendo Markets.

"If you start getting bills not passed through the

House, you start to get that kind of uneasy uncertainty going

on... it may well just be more of a sentiment-based thing than

anything else at the moment."

At 07:22 a.m. ET, Dow E-minis were down 20 points,

or 0.05%, S&P 500 E-minis were up 6.75 points, or 0.12%,

and Nasdaq 100 E-minis were up 55 points, or 0.26%.

All three main stock indexes saw their biggest single-day

percentage drops in a month on Wednesday as Treasury yields

spiked on worries about mounting U.S. debt.

Longer-dated Treasury yields stayed near their multi-month

highs on Thursday, with those on the 10-year benchmark

at 4.604%.

Most megacap and growth stocks inched higher in premarket

trading, with Google-parent Alphabet leading with a

1.4% rise.

Among other movers, shares of solar energy companies

including First Solar ( FSLR ) dropped 8.2% as Trump's tax-cut

bill is expected to end a number of green-energy subsidies.

Cryptocurrency and blockchain-related stocks jumped as

bitcoin, the world's biggest cryptocurrency, climbed to a

record high.

Exchange operator Coinbase advanced 2.3%, bitcoin

stockpiler Strategy gained 1.5% and crypto miners

including MARA Holdings ( MARA ) added 4%.

Snowflake jumped 10% after the cloud computing firm

raised its fiscal 2026 product revenue forecast.

Insurer UnitedHealth ( UNH ) extended losses after a nearly

6% drop in the last session and was down 2.3%.

Analog Devices ( ADI ) gained 2.5% after the chipmaker beat

second-quarter revenue estimates.

U.S. stocks have had a solid month so far, with the S&P 500

climbing more than 15% from its April lows, when Trump's

reciprocal tariffs rattled global markets.

A pause in tariffs, a temporary U.S.-China trade truce and

tame inflation data have pushed equities higher, although the

S&P 500 is still about 3% off its record highs.

At least two Federal Reserve officials including New York

Fed President John Williams are slated to speak later in the

day.

Weekly jobless claims data and a preliminary reading of the

May Purchasing Managers' Index are also scheduled for release.

Money markets have currently priced in about two

interest-rate cuts by the end of the year, according to data

compiled by LSEG.