Stocks moved further into the green on Monday morning as a rally in Krispy Kreme (KKD) shares pulled the consumer sector higher. 

The S&P 500 was up 0.3%, the Dow Jones Industrial Average gained 0.16%, and the Nasdaq gained 0.45%.

Krispy Kreme surged 25% after agreeing to be acquired by JAB Beech in a deal worth around $1.35 billion. JAB Beech offered $21 a share in cash, a 25% premium to Krispy Kreme's Friday close. The deal is expected to close in the third quarter.

Tyson Foods(TSN) - Get Report  was also boosting the consumer staples sector, climbing 3% after beating second-quarter estimates and boosting its full-year outlook. The meat producer said it expects full-year profit between $4.20 and $4.30 a share, up from previous guidance of $3.85 to $3.95.

Other consumer stocks including Anheuser-BuschInBev(BUD) - Get Report , Unilever(UL) - Get Report , and CVS Health(CVS) - Get Report  were all higher, while the Consumer Staples Select Sector SPDR ETF (XLP) - Get Report rose 0.8%. 

Crude oil was in rally mode earlier after a massive wildfire in Canada significantly reduced the country's daily output. The wildfire in Alberta has hampered more than 1 million barrels in daily production capacity as 11 producers and three pipeline operators were forced to limit operations. The reduced output is equivalent to more than a third of Canada's daily production.

Saudi Arabia's government endured a shakeup over the weekend with oil minister Ali al-Naimi, who had held the position for two decades, replaced with Khalid al-Falih. Al-Falih is a former chairman of Saudi Aramco, the state-run oil giant that is considering a partial initial public offering. Al-Falih said in a statement that the major oil-producing country would "maintain its stable petroleum policies."

West Texas Intermediate crude oil was down 1.3% to $44.08 a barrel after topping $45 earlier in the session.

Chinese markets were under pressure after trade shrank in April, contributing to worries over the world's second-largest economy. Exports fell 1.8% last month, while imports slumped 10.9%. China suffered its slowest growth in seven years in the first quarter as a manufacturing slowdown and weak global demand impacted its economy.

Sotheby's(BID) - Get Report  fell 5% after reporting a steeper-than-expected loss in its first quarter. The auction house said it had a loss of 41 cents a share, far wider than a loss of 7 cents in the year-ago quarter. Consensus was for a loss of 26 cents a share. Net auction sales fell 35% in the recent quarter after an especially favorable first quarter last year.

Valeant Pharmaceuticals (VRX)  was slightly lower after announcing plans to file first-quarter earnings on or before June 10. The drugmaker had postponed the release as it underwent an internal accounting investigation. Valeant reiterated previous first-quarter revenue and earnings guidance.