Global stock markets experienced a downturn on Monday as investors reacted to the looming implementation of President Trump's tariffs, set to be enforced on Wednesday. The S&P 500 witnessed a 0.6% decline, while the Nasdaq composite saw a more significant drop of 1.6%. The market sentiment was primarily driven by concerns over inflation and a potential global economic slowdown, prompting substantial sell-offs across major indices worldwide. This decline reflects the mounting economic uncertainty prevalent in the current market environment.