U.S. financial markets experienced significant volatility on Monday following President Donald Trump’s rejection of a proposed seven-day ceasefire with Iran amid ongoing regional tensions. The announcement contributed to a broad decline in stock prices and pushed Treasury yields to levels not seen in nearly two decades.

The yield on the benchmark 10-year U.S. Treasury note surged to 5.24%, marking its highest point since 2002. This increase in yields reflects growing investor concerns over geopolitical risks and potential instability in the Middle East affecting global economic conditions. Higher yields typically signal rising borrowing costs and can weigh on stock valuations.

Equity markets responded negatively to the heightened uncertainty. Major stock indexes fell as investors weighed the implications of stalled diplomatic efforts between the United States and Iran. The rejection of the ceasefire proposal raised fears that the conflict could escalate further, disrupting trade and energy supplies, which are critical to the global economy.

The administration’s decision to dismiss the ceasefire came amid a backdrop of mounting tensions following a series of confrontations between U.S. forces and Iranian-backed groups in the region. Washington’s firm stance reflects its broader strategic policy aimed at pressuring Tehran to alter its nuclear activities and regional behavior. However, critics argue that this approach risks prolonging conflict and increasing volatility in international markets.

Market analysts noted that the sharp rise in Treasury yields signals a shift toward safer, income-generating assets amid uncertainty. Investors are closely monitoring how the situation might evolve, as prolonged conflict could lead to disruptions in oil exports from the Middle East, further influencing inflation and economic growth.

The Trump administration has indicated it remains open to diplomatic dialogue but insists that any ceasefire must address underlying issues comprehensively rather than serve as a temporary measure. Meanwhile, Iran’s leadership has condemned the U.S. position and continues to call for negotiations without preconditions.

As of Monday’s close, U.S. stocks remained under pressure, and Treasury yields hovered near their highest levels in nearly 20 years, underscoring the market’s sensitivity to geopolitical developments and policy decisions related to the Iran conflict.