NEW YORK — U.S. stock markets faced significant declines on Monday as investors reacted to a potential new wave of tariffs and rising Treasury yields, shaking confidence across major indexes. The Dow Jones Industrial Average opened sharply lower, marking a turbulent start to the trading week amid escalating concerns surrounding economic policy.

The S&P 500 and Nasdaq also witnessed steep drops, as fears over potential import duties threatened to overshadow earlier optimism about economic recovery. This market turbulence can be attributed in part to comments from the White House suggesting a reevaluation of trade agreements, which has left many investors feeling uncertain.

Economic indicators released over the weekend highlighted a mixed outlook. While some sectors showed signs of resilience, others were adversely affected by geopolitical tensions, particularly the U.S.-Greenland standoff, which has further exacerbated market anxieties. Analysts noted that such uncertainties often lead to increased volatility in the stock market.

In the bond market, a pronounced sell-off saw Treasury yields rise, which frequently correlates with a pullback in equities. The yield on the 10-year Treasury note jumped above a critical threshold, signaling a shift that could influence borrowing costs and consumer spending.

Investors are paying close attention to Federal Reserve signals regarding interest rates, as any adjustments could have far-reaching implications for market stability. With inflationary pressures remaining a concern, the Fed’s next moves will be closely scrutinized in the coming weeks.

Corporate earnings reports expected over the next few days might provide additional cues for market direction. Companies in various sectors are set to release their quarterly results, which could either restore confidence or contribute to existing uncertainties.

As the trading session proceeded, market sentiment remained fragile. Analysts recommend that investors maintain a cautious stance as they navigate these tumultuous waters. With unpredictable international dynamics and domestic economic factors at play, the landscape remains uncertain as traders brace for potential repercussions in various sectors.