Goldman Sachs forecasts U.S. inflation to rise slightly, with both headline and core CPI expected to increase by 0.3% month-on-month in September. Despite this modest growth, the bank anticipates a continued moderation of core inflation to around 3.1%. The easing of car prices and airfares is contributing to reduced inflationary pressure, while the impact of rising labor costs and housing market activity is also expected to decline. However, tariffs may increase costs for certain sectors like communications, home improvement, and entertainment. Despite the ongoing government shutdown, Goldman Sachs expects the delayed September inflation report to be released this Friday.