#TrumpTariffs When Donald Trump announces new tariffs on Twitter, the markets immediately react: company stocks fall or rise, currency exchange rates change, and commodity prices fluctuate. His entourage, knowing about these statements in advance, can take advantage of these fluctuations — for example, betting on the decline of certain stocks or investing in those that will benefit from the tariffs. This allows them to profit from insider information. Although such actions may be illegal, they are difficult to prove, especially when everything appears to be a 'successful prediction'.