U.S. stock markets experienced volatility and ended lower amid escalating tensions between Israel and Iran, which have persisted for five days. Investor anxiety increased as the U.S. military deployed fighter jets to the Middle East. President Donald Trump intensified his rhetoric by calling for Iran's "unconditional surrender" and considered providing military support to Israel. On June 17, major U.S. indices closed with losses: the S&P 500 fell 0.84%, the Dow Jones Industrial Average declined 0.70%, and the Nasdaq Composite dropped 0.91%. Following the Federal Reserve's recent decision, markets showed mixed reactions, with investors closely monitoring the conflict and awaiting further policy signals. U.S. stock futures declined on June 20, reflecting ongoing uncertainty, while global oil prices rose to their highest settlement levels since January. The U.S. stock and bond markets were closed for the June holiday during this period.