Stock futures drop as investors worry about tariffs and Treasury yields as President Donald Trump's tax bill continues to travel through Congress.

President Trump’s “big beautiful bill,” featuring tax cuts and increased spending, has rattled bond markets due to fears it will sharply increase U.S. national debt. Wall Street analysts are now questioning America’s status as a financial safe haven.

U.S. stock index futures were muted on Friday as investors were risk-averse after President Donald Trump's tax and spending bill won a crucial House vote the previous day, raising concerns about the country's deteriorating fiscal outlook.