The recent optimism on Wall Street dissipated early Thursday as companies continued to reassess their financial outlooks due to uncertainty over U.S. President Donald Trump's on-again-off-again tariff policies.

Wall Street is more hesitant following a big two-day rally as U.S. companies continue to say uncertainty created by President Donald Trump’s trade war is scrambling their expectations for the year

U.S. stocks rallied further as better-than-expected profits for U.S. companies piled up, though CEOs say they're unsure whether it will last because of uncertainty created by President Trump's trade war.