Wall St mixed after Trump tax bill wins US House vote

The benchmark S&P 500 has edged lower in choppy trading after the US House of Representatives voted to pass President Donald Trump's tax bill, which is expected to burden the country with trillions of dollars in extra debt, by a razor-thin margin.

If what Trump has described as a "big, beautiful bill" becomes law, it is expected to add about $US3.8 trillion ($A5.9 trillion) to the federal government's $US36.2 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 fulfil much of Trump's populist agenda if passed, delivering new tax breaks on tips and car loans and boosting military expenditure.

"For all that the government has been trying to reduce government spending and the overall debt level, it seems that this bill is basically going to undo all that they have done," said Sam Stovall, chief investment strategist at CFRA Research.

In early trading on Thursday, the Dow Jones Industrial Average fell 72.70 points, or 0.17 per cent, to 41,790.95, the S&P 500 lost 8.11 points, or 0.14 per cent, to 5,836.38, and the Nasdaq Composite gained 28.91 points, or 0.15 per cent, to 18,901.55.

Nine of the 11 S&P sub-sectors traded lower, with utilities and energy among top decliners and down more than 1.0 per cent each.

Longer-dated Treasury yields stayed near their multi-month highs, with those on the 10-year benchmark at 4.606 per cent and the 30-year Treasury yield at a new 19-month high.

Most megacap and growth stocks inched higher, though Alphabet outpaced the pack with a 3.4 per cent rise.

Shares of solar energy companies including First Solar dropped 4.1 per cent as Trump's tax bill is expected to end a number of green-energy subsidies.

Snowflake jumped 9.0 per cent after the cloud computing firm raised its fiscal-year 2026 product revenue forecast.

All three main stock indexes had witnessed their biggest single-day percentage drops in a month on Wednesday as Treasury yields spiked on worries about mounting US debt.

US stocks have had a solid month so far, with the S&P 500 climbing more than 15 per cent from its April lows, when Trump's reciprocal tariffs roiled global markets.

A pause in tariffs, a temporary US-China trade truce and tame inflation data have pushed equities higher, although the S&P 500 is still about 3.0 per cent off record highs.

Fed Governor Christopher Waller said in an interview to Fox Business that central bank rate cuts would be on the menu if the Trump administration's tariff agenda settles on the lower side of the ledger.

Traders are pricing in at least two 25-basis-point rate cuts by the end of the year, according to data compiled by LSEG.

On the data front, US business activity picked up in May while separate data showed jobless claims dropped last week, suggesting that the economy maintained a steady pace of employment growth.

Declining issues outnumbered advancers by a 3.3-to-1 ratio on the NYSE and by a 1.82-to-1 ratio on the Nasdaq.

The S&P 500 posted no new 52-week highs and nine new lows while the Nasdaq Composite recorded 20 new highs and 59 new lows.