This is what you need to know before the bell:
1. Trump's trade threat causes Asian stocks to slip. The U.S. President said he is willing to renegotiate or terminate a trade deal with South Korea
2. A passenger dragged off a United Airlines (UAL) plane has received a financial settlement. The condition of the payout is that the specific "amount remains confidential"
3. Four U.S. tech giant reported a surge in Q1 profits. Alphabet (GOOG) , Amazon (AMZN) , Intel (INTC) and Microsoft (MSFT) all saw an increase in year-on-year profits
4. U.K. consumer confidence slides to a 4-month low as the election kicks off. Inflation, Brexit and general election worries are keeping optimism in check.
5. Earnings are expected from Chevron (CVX) , ExxonMobil (XOM) & General Motors (GM) . The earnings reports bring to a close an active week of quarterly reports
READ MORE: 5 Things You Must Know Before the Market Opens Friday