The world this week -- Business
Russia's central bank ordered the Moscow stock exchange to close following the invasion of Ukraine.
Trading was halted in certain Russian companies on the New York Stock Exchange and Nasdaq.
The value of Russian stocks traded in London tumbled to almost worthless.
The London exchange later suspended dealings in dozens of firms.
The Russian finance ministry is to use $10bn from the sovereign-wealth fund to shore up shares in domestic companies.
Sberbank, Russia's biggest, was forced to cease its operations in Europe permanently.
Western companies responded to the tough sanctions introduced by America and its allies by retrenching from Russia.
After three decades in the country, BP is getting rid of its stake in Rosneft (BP could face a $25bn write-down).
Shell is ending its joint ventures with Gazprom.
ExxonMobil said it would pull all its investments in Russian oil and gas.
Total will not make any further investments.
Outside energy, Maersk and MSC, the world's biggest shipping lines, suspended services to Russia.
Apple said it would no longer sell iPhones there.
Daimler Truck, Jaguar Land Rover and Volvo will not deliver cars to the country; Ford suspended its Russian operations.
戴姆勒卡车（Daimler Truck）、捷豹路虎（Jaguar Land Rover）和沃尔沃（Volvo）将不会向俄罗斯交付汽车；福特（Ford）暂停了其在俄罗斯的业务
Dell halted its sales in Russia.
America and the EU banned Russian airlines from their air space.
Sanctions also prohibit the sale or supply of aircraft to Russia, which includes planes that are leased to Russian airlines.
Facebook, YouTube and TikTok blocked access to RT (Russia Today) and other Russian propaganda outlets.
The sporting world also stepped up to the plate.
FIFA and UEFA banned Russian football clubs and the national team from participating in international tournaments; UEFA also terminated its lucrative sponsorship deal with Gazprom.
Roman Abramovich, who was mentioned in the British Parliament as a possible target of sanctions, put Chelsea (disparagingly known as Chelski in London) up for sale.
He has owned the Premier League side since 2003.
After a U-turn, Russian and Belarusian athletes were banned from the Winter Paralympics.
Oil prices soared, despite a move by America, Europe and others to release a collective 60m barrels of oil from their reserves.
That attempt to tame prices was offset by the decision of OPEC+, which includes Russia, to maintain modest production increases for April.
America and other countries have pressed the cartel to ramp up output further.
Brent crude reached roughly $115 a barrel.