Trump Media & Technology is selling Truth API, an ultrafast feed of Trump's Truth Social posts to Wall Street firms for $100,000 a month (or $60,000 with a multi-year commitment). At least five firms have signed up.

Many big investment firms already use automated systems to monitor the president's posts, detect keywords and execute trades within fractions of a second. A Journal review of trading data shows the impact: in the minute following two Trump posts about Iran last month, investors traded more than 2 million shares, causing swings of over 2% in nearly two dozen energy and industrial stocks, according to DTN data.

On June 9, Trump posted at 12:38 p.m. that Iran had shot down an Apache helicopter patrolling the Strait of Hormuz, writing, "The United States must, of necessity, respond to this attack." Energy stocks spiked almost immediately. The White House referred comments to Trump Media & Technology, whose spokesperson said the API delivers posts "the instant they are made public to everyone, not before."