1. Earnings season in full swing: There's a deluge of corporate earnings reports on Tuesday.
Before the bell, investors will hear from 3M, Caterpillar, Coca-Cola, Eli Lilly, Harley-Davidson, JetBlue Airways, Lockheed Martin, Restaurant Brands International, Sherwin-Williams and Verizon.
Then Capital One, iRobot, Six Flags, Texas Instruments and Wynn Resorts will report after the close.
Two big trends to watch relate to US tariffs and taxes.
Investors are watching for what companies have to say about President Donald Trump's steel and aluminum tariffs and how they could affect their bottom lines. They could also discuss the corporate tax cut enacted late last year.
2. Spotlight on Spotify: Music-streaming service Spotify, which recently went public, is expected to make a big announcement at 9 a.m. ET.
Experts have suggested it could unveil its first hardware device; possibly a music player for the car.
3. Questions for Wells Fargo: The embattled bank is hosting its annual meeting starting at 11 a.m.
Angry shareholders and activists are expected to call on Wells Fargo to change its ways.
Critics point to a string of scandals - millions of fake accounts, unwanted auto insurance and needless mortgage fees - as proof that Wells Fargo needs to be broken up and CEO Tim Sloan should be ousted.
The meeting comes days after the bank was hit with a $1 billion fine for auto lending and mortgage abuses.
Europeans are counting on Macron to persuade Trump to change course on his plans for US tariffs on steel and aluminum imports from the European Union, which are set to take effect on May 1.
The US Conference Board will release its latest consumer confidence index for April at 10 a.m. The Census Bureau releases new home sales data from March at the same time.
The monthly S&P Case-Shiller home price index is out at 9 a.m.
5. Global market overview: US stock futures pointed to small gains at the open.
Crude oil prices increased to trade around $69 per barrel.
Yields on 10-year US Treasuries pulled back to 2.96%. Yields have been flirting with 3%, a level that hasn't been reached in more than four years.
6. Coming this week:
Tuesday - Caterpillar, Coca-Cola, JetBlue and Verizon earnings; US Conference Board releases monthly consumer confidence index
Wednesday - AT&T, Boeing, Chipotle, Comcast, Dr Pepper Snapple, Facebook and Twitter earnings
Thursday - Time Warner, Amazon, American Airlines, General Motors, PepsiCo, Starbucks and Southwest Air earnings
Friday - Exxon Mobil earnings; US releases Q1 GDP