Oil prices soared on Tuesday and investors shifted more money into ultra-safe US government bonds as Russia stepped up its war on Ukraine.
Stocks fell following a volatile day for major indexes as investors tried to measure how the conflict will impact the global economy. The S&P 500 index fell 0.7 per cent as of 10:14 am Eastern.
The Dow Jones Industrial Average fell 337 points, or 1 per cent, to 33,554 and the Nasdaq fell 0.5 per cent.
The bigger moves came from the markets for oil, agricultural commodities and government bonds.
Oil has been a key concern because Russia is one of the world's largest energy producers.
The latest bump in prices increases pressure on persistently high inflation that threatens households around the world.
US benchmark crude oil prices rose 6.6 per cent to $101.87 per barrel, reaching the highest price since 2014. Brent crude, the international standard, rose 6.6 per cent to $104.44.
Russia's invasion of Ukraine has also put more pressure on agricultural commodity prices, which were also already getting pushed higher with rising inflation.
Wheat and corn prices rose more than 4 per cent per bushel and are already up more than 20 per cent so far this year. Ukraine is a key exporter of both crops.
Investors continued putting money into bonds.
The yield on the 10-year Treasury fell to 1.75 per cent from 1.83 per cent late Monday. It is now back to where it was in early February, before topping 2 per cent for the first time in over two years.
The conflict in Ukraine has shaken markets globally and added to worries about economic growth in the face of rising inflation and plans from central banks to raise interest rates.
The US and its allies have been putting significant pressure on Russia's financial system as that nation continues its push into Ukraine and its key cities.
The value of the Russian ruble plunged to a record low Monday after Western countries moved to block some Russian banks from a key global payments system. Also Monday, the US Treasury Department announced more sanctions against Russia's central bank.
Various companies have announced plans to scale back or pull out from ventures in Russia, or to suspend operations in Ukraine due to the conflict.
The Russian central bank has also raised its key rate to 20 per cent from 9.5 per cent in a desperate attempt to shore up the plummeting ruble and prevent a run on banks. Russia's stock market remained closed on Tuesday.
Investors are closely monitoring developments in Ukraine while awaiting the latest updates from the Fed and US government on the economy.
Fed Chair Jerome Powell is to testify before Congress later this week and that could offer clues on the path ahead for raising interest rates.
A report on Friday will also show whether strength in the US jobs market continued in February, allowing the Fed more leeway to raise rates.