US stocks close lower as investors look for developments tied to US-Iran discussions and digest the latest round of corporate earnings. Multiple outlets report that trading ends on a down note after an earlier strong start to the week, suggesting investors are balancing optimism around earnings with uncertainty related to progress on talks aimed at a peace deal between the United States and Iran. In both accounts, market participants focus on whether the diplomatic process is moving forward, while also assessing company results released during the session. The articles describe the session as a pause or pullback rather than a major shift, with earnings data forming part of the day’s backdrop and investor attention remaining split between corporate performance and geopolitical signals from the ongoing negotiations. Overall, the coverage links the market’s retreat to a combination of investor expectations for earnings and ongoing monitoring of potential steps toward a US-Iran agreement.