1. More volatility?: US stock futures are pointing down on Tuesday after investors had a long weekend to consider their next moves.
Global stock markets dropped sharply earlier this month, with many falling by about 10%. They've been in recovery mode since then.
European markets are mostly rising in early trading, though the gains are modest.
Most Asian markets ended the day with losses. The Nikkei in Tokyo dropped 1%.
2. Takeover time: Shares in Rite Aid are surging on Tuesday after Albertsons agreed to buy the drug store company and its thousands of stores.
Rite Aid recently struck a deal with Walgreens Boots Alliance worth $4.4 billion to hand over nearly 2,000 of its stores. Albertsons is now buying the rest.
The deal has been designed in such a way that, once completed, the privately held Albertsons will become a publicly traded company on the New York Stock Exchange.
3. Earnings: Walmart and Home Depot are two of the bigger names reporting earnings ahead of the opening bell.
Walmart, the nation's largest private-sector employer, beat Wall Street forecasts last quarter and posted impressive online growth. Since then, Walmart has announced that it is both raising pay and shutting 63 Sam's Clubs locations, so executives will have a lot to talk about.
Home Depot has also been in the headlines, announcing plans last week to add 80,000 seasonal or permanent part-time workers, the same number it hired last year. To make it easier to fill the jobs it is allowing applicants to schedule interviews online for the first time.
Additionally, Cracker Barrel, Domino's Pizza, Gannett, MGM Resorts and Six Flags are releasing earnings before the open. Transocean and La-Z-Boy plan to release earnings after the close.
4. Market movers -- HSBC, InterContinental Hotels: Shares in HSBC are dropping by about 4.5% in London as investors reacted to the global bank's latest annual results and news that it plans to raise up to $7 billion in new capital in the first half of this year.
Fiona Cincotta, a senior market analyst at City Index, said the earnings showed "a disappointing loss of momentum," rising exposure to bad debts and profit margins that were under pressure.
Investors were also left disappointed that the company didn't announce a new plan for share buybacks.
"Overall, though, the bank is in far greener pastures than it was a few years ago," Cincotta said.
Shares in InterContinental Hotels Group are also dropping by about 5% in London after the hotel chain reported its latest annual results.
5. Coming this week:
Tuesday - Home Depot and Walmart earnings
Wednesday - FOMC minutes released
Thursday - Hewlett-Packard Enterprise and Chesapeake Energy earnings
Friday - Potbelly earnings