US equity futures fell ahead of Wednesday's opening bell as investors awaited President Donald Trump's tariff policy announcement.

Dow Jones Industrial Average futures were down 0.7%, S&P 500 futures declined 1%, and Nasdaq futures were 1.2% lower.

The White House is scheduled to unveil Trump's latest import levy plans at 4 pm ET.

Oil prices fell, with front-month global benchmark North Sea Brent crude down 0.6% at $74.07 per barrel and US West Texas Intermediate crude 0.5% lower at $70.83 per barrel.

Private payrolls based on ADP's employment report, released at 8:15 am ET, increased by 155,000 in March compared with estimates compiled by Bloomberg for a smaller 120,000 gain.

Factory orders, due at 10 am ET, are expected to have risen by 0.5% in February after January's 1.7% increase.

In other world markets, Japan's Nikkei closed 0.3% higher, Hong Kong's Hang Seng ended 0.02% lower, and China's Shanghai Composite finished 0.05% higher. Meanwhile, UK's FTSE 100 fell 0.7%, and Germany's DAX index was down 1.6%, France's CAC 40 was down 0.9% and Spain's IBEX 35 was down 0.3% in Europe's early afternoon session.

In equities, Trump Media & Technology Group (DJT) shares fell 7% pre-bell after the company filed with the US Securities and Exchange Commission a registration statement for potential primary and secondary offerings of securities. NCino (NCNO) stock was down 34% after the company reported late Tuesday lower fiscal Q4 non-GAAP earnings.

On the winning side, Sunshine Biopharma (SBFM) shares advanced 53%, a day after the company reported higher annual revenue for its fiscal 2024.