Post-debate polls indicate a slight lead for Donald Trump over Joe Biden, with Trump gaining ground in several key surveys following the first presidential debate. Despite Biden's faltering performance intensifying concerns about his capabilities, the race remains tight, and Trump's lead is not overwhelming. Historical trends show that first-term presidents often struggle in initial debates, but Biden's pre-existing vulnerabilities magnify the impact. Voter sentiment reflects dissatisfaction with both candidates, adding complexity to the electoral outlook. Financial markets are reacting to the debate, with investors preparing for potential Republican policy shifts under a Trump administration, including inflation and fiscal changes.