Wall Street stocks were mixed early Monday ahead of a deluge of major corporate earnings reports, a Federal Reserve decision and key economic data this week.

Ukraine and Russia have signed a landmark deal aimed at relieving a global food crisis caused by blocked Black Sea grain deliveries, ending months of negotiations and sending wheat prices tumbling to levels last seen before Moscow's invasion.

The German government will take a roughly 30% stake in energy supplier Uniper as part of a rescue package prompted by surging prices for natural gas and reduced Russian deliveries, the company and Chancellor Olaf Scholz said Friday.

Uniper, which has been Germany's biggest importer of Russian gas used to fuel industry, generate electricity and heat homes, asked for a bailout two weeks ago. German officials quickly pledged that they would help, but thrashing out the details took time. One result will be higher prices for customers.

Twitter reported a quarterly loss Friday as revenue slipped even as its number of users climbed.

The social media company's latest quarterly earnings figures offered a glimpse into how the social media business has performed during a months-long negotiation with billionaire and Tesla CEO Elon Musk over whether he will take over the company.

U.N. Secretary-General Antonio Guterres and Turkish President Recep Tayyip Erdogan were due on Friday to oversee the signing of a key agreement that would allow Ukraine to resume its shipment of grain from the Black Sea to world markets and Russia to export grain and fertilizers — ending a standoff that has threatened world food security.

Last week, the sides reached a tentative agreement on a U.N. plan that would enable Ukraine to export 22 million tons of desperately needed grain and other agricultural products that have been stuck in Ukraine's Black Sea ports due to the war. The unblocking of the grain stockpiles will help ease a food crisis that has sent prices of vital commodities like wheat and barley soaring.

Moscow will "consider" Budapest's request for more gas this year, Russian Foreign Minister Sergei Lavrov said Thursday, as Russia seeks to develop its "strategic" ties with Hungary.

Ford announced a series of initiatives Thursday to strengthen its supply of batteries and raw materials needed for electric vehicles, as the US automaker ramps up production to meet booming demand. 

The European Central Bank raised interest rates Thursday for the first time in 11 years, joining steps already taken by the U.S. Federal Reserve and other major central banks but raising new questions about whether the rush to make credit more expensive will plunge major economies into recession at the price of fighting inflation.

The bank's surprise hike of half a percentage point for the 19 countries using the euro currency is expected to be followed by another increase in September, possibly of another half a point.

Europe faced an energy crisis even before drama emerged about the Nord Stream 1 pipeline reopening from Russia to Germany.

While natural gas started flowing again Thursday after the major pipeline shut down for 10 days of maintenance, Europe will still struggle to keep homes warm and industry humming this winter.

Natural gas started flowing through a major pipeline from Russia to Europe on Thursday after a 10-day shutdown for maintenance, the operator said.

But the gas flow was expected to fall well short of full capacity and the outlook was uncertain — which leaves Europe still facing the prospect of a hard winter.