On a chaotic morning on Wall Street, a well-known news aggregator on X, Walter Bloomberg, posted a false report stating that President Trump was considering a 90-day pause on his contentious tariff proposal, sparking significant market volatility.

The report, which was later proven to be untrue, led to a rapid rise in index funds like the Dow Jones, only to reverse course minutes later. This type of market fluctuation is more notable than the typical daily ups and downs of a stock, which is why the false report generated so much attention.

Despite not being affiliated with any news organization and having no connection to Bloomberg News, the Walter Bloomberg account has been regarded as a trustworthy source of tech and business news. Instead of writing its own posts, the account publicly shares news headlines as they appear on the Bloomberg Terminal, a subscription-only service used by financial professionals for real-time market data and breaking news headlines.

The Bloomberg Terminal often features headlines from outlets like CNBC and Bloomberg before they are published online, making accounts like Walter Bloomberg a valuable resource for quick news. However, on Monday, a series of reporting errors from CNBC and Reuters, which were then amplified by the Walter Bloomberg account on X, appeared to have a direct impact on the stock market during an already tumultuous day.

The now-deleted headline posted by Walter Bloomberg stated: “HASSETT: TRUMP IS CONSIDERING A 90-DAY PAUSE IN TARIFFS FOR ALL COUNTRIES EXCEPT CHINA.” The White House’s rapid response team quote-tweeted the post and denied that Kevin Hassett, Trump’s director of the National Economic Council, made these statements.

To support their claim, the White House-affiliated account shared a clip from Fox News, where the false statement seemed to have originated. In response to billionaire Bill Ackman’s plea for the Trump administration to institute a 90-day pause on the tariff plan, a Fox anchor asked Hassett if he would consider a 90-day pause.

Hassett replied, “You know, I think the president is going to decide what the president is going to decide… But I would urge everyone, especially Bill, to ease off the rhetoric a little bit.” When asked on X where he got the news from, Walter Bloomberg said the headline he posted was from Reuters.

Walter Bloomberg did not respond to TechCrunch’s request for comment. Reuters told TechCrunch in a statement: “Reuters, drawing from a headline on CNBC, published a story on April 7 saying White House economic adviser Kevin Hassett had said that President Donald Trump was considering a 90-day tariff pause on all countries except China. The White House denied the report. Reuters has withdrawn the incorrect report and regrets its error.”

Walter Bloomberg pointed to Reuters as the source of the false report, while Reuters attributed the error to CNBC. A CNBC spokesperson told TechCrunch in a statement, “As we were chasing the news of the market moves in real-time, we aired unconfirmed information in a banner. Our reporters quickly made a correction on air.”

Walter Bloomberg broke from its typical robotic tone with a simple “wtf,” then screenshotted the Terminal’s report from CNBC stating that the White House was not aware of any plan for a 90-day pause.

It is likely that Wall Street traders saw this news on the Terminal itself, rather than from the Walter Bloomberg aggregator. However, people outside of the financial sector rely on accounts like Walter Bloomberg to mimic the rapid news access of the Terminal.