German chancellor Olaf Scholz later pushed back against the idea of a European embargo on Russian oil imports, arguing that he wanted to focus on "sustainable" pressure that would not be too much of a burden on citizens.
"All our steps are designed to hit Russia hard, and be sustainable over the long term," Scholz said in a statement. "At the moment, Europe's supply of energy for heat generation, mobility, power supply and industry cannot be secured in any other way. It is therefore of essential importance for the provision of public services and the daily lives of our citizens."
Oil prices fell from their high following Scholz's comments, with Brent pulling back to around US$120. Gas also slipped from the day's high of €345 a megawatt hour to trade at about €240.
Global equities traded choppily as investors debated how much damage the conflict would wreak on developed economies.
In the US, Wall Street's S&P 500 lost 1.5 per cent, while the technology-heavy Nasdaq Composite dropped 1.9 per cent.
Europe's regional Stoxx 600 share index, which last week dropped 7 per cent in its worst performance since March 2020, fell more than 3 per cent in early dealings before trimming its losses to trade down 0.8 per cent. The Stoxx sub-index of European bank shares dropped 3.6 per cent and is down by more than a quarter since the week ending February 18.
"While the market had assumed sanctions would be somewhat toothless, we now see the US administration will go to some lengths to punish Russia," said Altaf Kassam, head of European investment strategy at State Street Global Advisors.
In currencies, the euro fell 0.4 per cent to $1.09, around its weakest level against the dollar since May 2020. The rouble weakened to as much as Rbs145 against the dollar, marking a record low for the Russian currency.
The spot gold price breached $2,000 for the first time since August 2020 as investors sought shelter from market risk in the haven asset.
Written by: Naomi Rovnick, Neil Hume and Hudson Lockett
© Financial Times