In September, Dow Jones rose while Merck, JPMorgan, and Boeing experienced notable declines.

In September, the Dow Jones Industrial Average rose nearly 2%, but notable declines were seen in Merck (4.1%), JPMorgan Chase (6.2%), and Boeing (12.5%). Merck's sales fell after weak second-quarter results. JPMorgan expects a drop in net interest income, while Boeing faces challenges with its Starliner and 737 MAX. Despite these setbacks, investors may find buying opportunities in blue-chip stocks. The Nasdaq performed well, with potential for recovery in underperforming stocks like Dollar Tree and Zscaler.