(AP) -- Stocks were mixed in morning trading on Wall Street Monday as investors tried to anticipate whether Russia could face even stricter economic sanctions, while Twitter soared on a big investment from Tesla's CEO Elon Musk.
The S&P 500 rose 0.2% as of 10:23 a.m. Eastern. The Dow Jones Industrial Average fell 70 points, or 0.2%, to 34,752 and the Nasdaq rose 1%.
There were more stocks losing ground than making gains within the benchmark S&P 500, but solid gains from technology stocks and big communications companies helped temper losses elsewhere. Tech companies, with their pricey stock values, tend to have more weight in pushing the market in up or down.
Twitter surged 23% after the company disclosed that Musk had taken a 9.2% stake in the social media platform. In recent weeks Musk has publicly questioned the company's commitment to free speech. The gains were a key factor in lifting the broader communications sector and keeping the S&P 500 in the green.
Investors continue to monitor the conflict in Ukraine, where Russia could face even stricter economic sanctions now that details are emerging of what appear to be deliberate killings of civilians.
The European Union's foreign policy chief, Josep Borrell, joined a growing chorus of international criticism of the alleged atrocities, saying the 27-country bloc "will advance, as a matter of urgency, work on further sanctions against Russia."
Russia's invasion of Ukraine has elevated concerns about rising inflation and the impact on global economic growth. Prices for everything from food to clothing had already been rising and the war has made for even more volatile energy prices.
U.S. benchmark crude oil prices rose 4.3% and Brent crude, the international standard rose 3.6%. Prices are up roughly 40% globally, which has put pressure on costs for gasoline and other goods.
Bond yields gained ground. The yield on the 10-year Treasury rose to 2.43% from 2.38% late Friday. The yield on the two-year Treasury rose to 2.47% from 2.44%.
The two-year yield remains above the 10-year yield, which is a potentially ominous sign. Such a flip of the usual relationship between two- and 10-year yields has preceded many recessions in the past, though it hasn't been a perfect predictor. Some market watchers caution the signal may be less accurate this time, because of distortions in yields caused by extraordinary measures by the Federal Reserve and other central banks to keep interest rates low.
Bond yields have been gaining ground all year as Wall Street prepares higher interest rates. The Federal Reserve has already raised its key overnight rate once, the first such increase since 2018. The central bank is expected to continue raising rates throughout 2022 to help counter the impact from rising inflation.
The Fed is due to release minutes from its last meeting on Wednesday.
Markets in Europe were mostly higher. Asian markets also rose and Hong Kong's Hang Seng jumped 2.1% after regulators in Beijing said they plan to revise rules regarding access of overseas regulators to full audits of companies that have shares listed in overseas markets.