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Discussing lessons from past sanction cases, and the risks with U.S. sanctions on Russia, with Robert Kahn, Council on Foreign Relations. He thinks this could be "Putin's Lehman moment."
Longtime trader Art Cashin believes Wednesday's across-the-board rally could be the one to end the selloff in momentum stocks.
Chris Weafer, senior partner at Macro Advisory Partners, says investors should not be worried about harsher economic sanctions on Russia, despite continuing tensions with Ukraine.
First quarter economic growth in Russia slowed and Moscow's economy minister is attributing it to uncertainty over the Ukraine crisis.
Philippe Legrain, author of the European Spring, says the European Union needs to realize that "we don't live in a postmodern la-la land".
Sergiy Kruglyk, director of international affairs at the National Bank of Ukraine, says that the country is using monetary policy tools to try and stabilize the Ukrainian economy.
Thomas Grove, correspondent at Reuters, says the Ukrainians in the east of the country feel "marginalized" and want their voices to be heard.
Ukrainian forces launched a "special operation" on Tuesday against separatist militia in the Russian-speaking East.
At the end of February, Ukraine's months-long conflict erupted into a series of violent clashes. Here's what you should know.
CNBC's Michelle Caruso-Cabrera reports the Ukrainian government is saying it has now taken control of the airport where heavy gunfire was reportedly opened.
CNBC's Michelle Caruso-Cabrera shares a report Russian President Vladimir Putin expects to see a clear United Nations condemnation of Kiev's "anti-constitutional" actions in Eastern Ukraine.
CNBC's Michelle Caruso-Cabrera says reporters of the Associated Press and Reuters heard heavy gunfire near an airport of Kramatorsk, Ukraine. Caruso-Cabrera looks at the rally in U.S. Treasurys.
President Obama said to President Putin during a phone call that Russia would have to face further sanctions if it continues its actions in Ukraine.
The Ukrainian town of Slovyansk is under the control of a pro-Russian militia and there's been no indication of a Ukrainian army attack yet says James Marson, reporter at The Wall Street Journal.
Peter Garnry, equity strategist at Saxo Bank, expects equities to continue to outperform bonds in 2014 and advises investing in Russia, South Korea as well as Spain and Italy.
Lilit Gevorgyan, CIS analyst at IHS Global Insight, says Russia wants Ukrainian regions to be more autonomous so they can veto deeper integration in the European Union and NATO.
Olexander Scherba, Ukrainian ambassador-at-large, says the country is "under attack" and "ready to respond".
Samuel Greene, founding director at King's Russia Institute at King's College London, says Putin is controlling events in East Ukraine.
Carlo Gallo, director at Enquirisk, says Russia's "endgame" is to control East Ukraine and disrupt the country's integration with the European Union.
As long as instability remains contained within the borders of Ukraine, Jonathan Pain, Author of the Pain report, says global financial markets will slowly become 'desensitized' to it.