President Trump's tariff announcements have unsettled the financial markets. This instability recalls past crises, like the Black Monday 1987 stock market crash. Black Monday saw a 20.5% S&P 500 ...

The S&P 500 , opens new tab has climbed more than 10% so far this year to post its biggest first-quarter gain since 2019. The benchmark index in late January hit its first record high in two years ...