Stock futures moved higher on Tuesday, extending gains seen a day earlier, after a series of positive earnings results from the likes of DuPont (DD - Get Report) , Novartis (NVS - Get Report)  and Rite Aid (RAD - Get Report) . 

S&P 500 futures were up 0.25%, Dow Jones Industrial Average futures added 0.8%, and Nasdaq futures climbed 0.3%. 

France's position in the European Union looked a little more secure on Monday following the first round of voting in the French presidential election. A vote for the status quo lit a fire under European markets and led to Wall Street's best day in nearly two months. Stock gains pulled the three U.S. indexes into the green for April, while the Nasdaq scored a new record.

DuPont rose more than 1% in premarket trading Tuesday after posting stronger-than-expected first-quarter profit and guiding for first-half operating earnings to rise 16% as it grows agricultural sales following its $130 billion merger with Dow Chemical (DOW) . Operating earnings for the first three months of the year were $1.64 a share, the company said, well ahead of the consensus forecast of $1.38 and up 28.1% from the same period last year. Revenue for the first quarter was $7.7 billion, DuPont said, ahead of the market forecast of $7.5 billion and a 5% increase from the first three months of last year.

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Novartis added 2% after narrowly beating forecasts for its first quarter and committing to full-year guidance. Net income for its March-ended quarter of $2.69 billion came in higher than $2.67 billion consensus, though fell 3.5% from a year earlier. Revenue of $11.54 billion was in line with estimates. Novartis said sales of psoriasis drug Cosentyx and heart failure treatment Entresto offset generic erosion. 

Fellow drugmaker Eli Lilly (LLY - Get Report) fell more than 2% after swinging to a quarterly loss and reducing its full-year profit guidance. The company swung to a net loss of 10 cents a share over its first quarter compared to profit of 41 cents a share a year earlier. Adjusted earnings of 98 cents a share beat by 2 cents. Full-year guidance was reduced to $2.60 to $2.70 a share from previous forecasts of $2.69 to $2.79 a share, a lower result tied to one-time cost-cutting expenses. 

Rite Aid climbed 5% after updating investors on its "lengthy merger process" with Walgreens Boots Alliance (WBA - Get Report) and reporting a better quarter than anticipated. CEO John Standley said the merger with Walgreens was "having a negative impact" on its performance. Both companies agreed to extend the merger deadline to July 31. The pharmacy chain also reported adjusted break-even results for the quarter, a surprise to investors looking for a loss of 4 cents a share. 

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Caterpillar (CAT - Get Report)  climbed 5% premarket as solid demand translated to a strong quarterly performance. Net income of $1.28 a share soared past Wall Street estimates of 62 cents a share. Revenue of $9.82 billion came in higher than a target of $9.27 billion. For the full year, Caterpillar expects earnings of $3.25 a share on $38 billion to $41 billion in sales. 

Lockheed Martin (LMT - Get Report) reported a weaker first quarter and warned of a worse full-year performance than previously anticipated. The defense company earned $2.61 a share over its recent quarter, down from $2.91 a share a year earlier and below consensus of $2.79. Sales of $11.1 billion fell short of targets by $100 million. Full-year earnings guidance of $12.15 to $12.45 a share was lowered by a dime at the low- and high-end. 

Coca-Cola (KO - Get Report) fell short of earnings estimates over its first quarter. Net income of 27 cents a share slid from 34 cents in the same period a year earlier, while adjusted earnings of 43 cents a share missed by a penny. Revenue of $9.12 billion came in higher than estimates of $8.89 billion. The soda company anticipates adjusted earnings over the full year to decline by 1% to 3%. 

Biogen ( BIIB - Get Report) rose nearly 4% in premarket trading after reporting a better-than-expected quarter even as earnings declined from a year earlier. Net income of $3.46 a share fell from $4.43 a year earlier. Weaker earnings included the $263 million charge for a settlement with and license payments to  Forward Pharma ( FWP) . Adjusted earnings of $5.20 a share came in higher than estimates of $4.97. Revenue of $2.81 billion came in higher than consensus of $2.73 billion.  

T-Mobile (TMUS - Get Report)  was slightly lower even after posting an increase in customers over its first quarter and profit well above expectations. The telecom added more than 1.1 million new customers over its recent three-month period, while net income of 80 cents a share surged past consensus of 34 cents. Revenue of $9.6 billion was in line with estimates.

Alcoa (AA - Get Report) reported a mixed first quarter, topping estimates on its bottom line but falling short on sales. Adjusted net income of 63 cents a share exceeded estimates by a dime. Revenue of $2.66 billion came in $300 million under targets. 

Congress continues to scramble to avoid a government shutdown this week by pushing through a continuing resolution. Negotiations likely will intensify on Friday ahead of the deadline at midnight, April 28. Office of Management and Budget Director Mick Mulvaney has said that money for President Trump's proposed border wall must be part of the spending bill Congress will look to pass, a major conflict for Democrats in opposition to the expensive project.