Today, the Dow Jones index experienced a decrease amidst current U.S.-Iran developments. However, Micron stock and Sandisk showed strong performance. The market saw a fluctuation in response to the news. Specific numbers regarding the extent of the Dow Jones fall and the increase in Micron stock and Sandisk were not disclosed in the information provided. Additionally, other companies such as Arm and Dell showed promising growth, contributing to the market's overall mixed performance for the day.