According to the White House, President Trump’s imposed tariffs are expected to be in effect directly following their declaration. In an indication of uncertainty among investors, world financial markets saw an increase in activity during the initial trading session of April, with specialists holding varying perspectives regarding the overall future of the stock market.
Source: https://www.euronews.com/business/2025/04/02/white-house-tariffs-to-take-effect-immediately-upon-the-announcement