U.S. stock indices closed sharply lower on Monday as investors digested the latest global trade developments, including President Donald Trump's unexpected tariffs that sent shockwaves through international commerce.

Market Performance:

• S&P 500 dropped 36.29 points (0.64%)

• Dow Jones Industrial Average fell 98.60 points (0.24%)

• Nasdaq Composite declined 133.49 points (0.74%)

Key Drivers:
Investors, who had been anticipating trade deal developments to ease tensions, were instead met with a new wave of tariffs after Trump announced 100% duties on foreign-produced films—a move seen as further escalating trade conflicts.

Ongoing Uncertainty:
According to CNBC, market participants remain uncertain about the timeline for U.S. tariff agreements with other nations, contributing to Monday's sell-off. The lack of clarity continues to weigh on investor sentiment.

Context:
The tariffs represent another twist in ongoing global trade tensions, with markets reacting swiftly to policies perceived as protectionist. Analysts suggest volatility may persist until clearer trade resolutions emerge.