The Dow Jones fell, due to McDonald's shares taking a big fall, down 6%.
This comes after the US Centers for Disease Control (CDC) linked an E. coli outbreak to the chain's popular Quarter Pounder burgers, leading to several people being hospitalized and even one reported death.
Starbucks shares also fell 4% as third-quarter results showed a decline in same-store sales, and they suspended financial forecasts for 2025.
While the Dow and S&P 500 were virtually unchanged on Tuesday, the Nasdaq Composite posted a slight gain of 0.18%.
Investors were worried about the rise in US Treasury yields, which reached 4.2%, the highest since July.
The increase was driven by strong economic data and concerns over the national deficit.
Investors' focus will shift to earnings reports from major companies such as AT&T, Boeing, and Tesla, which may further influence market trends.
In short, challenging times for investors with unexpected developments in major companies adding to uncertainty in global stock markets.
