Alastair Newton, senior political analyst at Nomura, says markets are underestimating the risk of Russian military action in eastern Ukraine.
The United States will send about 600 US troops to Poland and the three Baltic states to take part in exercises in the coming days to reassure NATO allies.
With capital flooding out of the country, the stock market falling, the Crimea seizure is turning out to be a costly move.
Roderic Lyne, former U.K. ambassador to Russia, explains that Russia wants an "emasculated Ukraine" and says the crisis is helping Putin divert his country's attention away from the economy.
David Dalton, eastern Europe editor of the Economist Intelligence Unit, says the Geneva accord which aimed to resolve the Ukraine crisis is looking "fragile".
James Marson, reporter at the Wall Street Journal, said the violence in east Ukraine is getting "a lot worse" as reports of shootings surface.
Jen Psaki of the State Department suggested that Vladimir Putin could be sanctioned by the US over the crisis in Ukraine, but not immediately.
Speaking to NBC's Meet the Press, Arseniy Yatsenyuk, Prime Minister of Ukraine, discusses what needs to be done to calm the violence in eastern Ukraine.
Foreign ministers meeting in Geneva agreed "initial concrete steps" to de-escalate the situation in Ukraine, they said in a joint statement.
President Obama answers questions about the state of Ukraine and Russia's diplomatic handling of the crisis.
As tension persists between Russia and Ukraine, markets' view on Russian bonds has turned increasingly icy.
American oil companies are telling our U.S. state department they don't want a full-scale financial sanctions war, explains CNBC's Larry Kudlow. He makes the case for raising the value of the U.S. Dollar by 15 percent which he says will kill the price of oil.
CNBC's Steve Sedgwick provides an update from Geneva, where Ukraine talks are taking place.
Russia has dug itself a deep economic hole in exchange for its geopolitical ambitions, and the problem's getting worse.
Secretary of State John Kerry comments after a meeting in Geneva with Russian Foreign Minister Sergey Lavrov and representatives of the EU and Ukraine.
The head of a leading Russian hypermarket chain has shrugged off the ongoing crisis in Ukraine, and signaled willingness to open a store in Crimea.
Jan Dunning, CEO of St Petersburg-headquartered hypermarket chain Lenta, says the situation in Ukraine has had no impact on the group, as consumer confidence remains unaffected in Russia.
Alan Mendoza, executive director at the Henry Jackson Society, and Simon Ballard, head of credit strategy at National Australia Bank, discuss the crisis in Ukraine and the impact on markets.
NSA leaker Edward Snowden asks a question during Russian President Putin's annual Q&E session, reports CNBC's Michelle Caruso-Cabrera.
CNBC's Michelle Caruso-Cabrera reports some of the highlights from Russian President Vladimir Putin's annual talk.