• Ian Bremmer, President of the Eurasia Group, explains why he thinks geopolitical uncertainty, sparked by the crisis in Ukraine at the moment, may be at levels worse than the September-11 attacks.

  • WELLINGTON, March 3- The yen rallied to a three-week high against the U.S. dollar on Monday while the Australian and New Zealand dollars stumbled as escalating political tensions in Ukraine prompted investors to dump higher-risk currencies in favour of lower-risk, liquid ones.

  • UPDATE 1-Russia warns Ukraine may lose gas discount Saturday, 1 Mar 2014 | 9:11 AM ET

    MOSCOW/ KIEV March 1- Russia issued several warnings on Saturday that Ukraine may lose a discount to the gas price it now pays to Gazprom due to Kiev's outstanding gas debt. Russia's state gas company Gazprom estimates Ukraine's outstanding gas debt at $1.55 billion for 2013 and gas deliveries so far this year.

  • *Obama warns Russia over reports of military movements. *Ukraine accuses Russia, Moscow denies involvement. President Barack Obama has warned Russia against any military intervention in Ukraine after the country's new leaders accused Moscow of deploying forces in the Crimea region.

  • Traders buy protection on Russia rumors: Pro     Friday, 28 Feb 2014 | 7:44 PM ET

    Discussing Ukraine's economic impact on the stock market, with Michael Cuggino, Permanent Portfolio Funds, and Jack Bouroudjian, Index Financial Partners.

  • *Obama steps into Ukraine- Russia tension over Crimea. WASHINGTON, Feb 28- President Barack Obama warned Russia on Friday that military intervention in Ukraine would lead to "costs," as tension with old foe President Vladimir Putin rose in a Cold War-style crisis.

  • Discussing Russia's involvement in Ukraine, with Don Jensen, Center for Transatlantic Relations and CNBC's Michelle Caruso-Cabrera.

  • In addition, questions over whether Russia could be drawn into the conflict in Ukraine will likely weigh on investor sentiment. "It will be interesting to see the action on S&P futures on Sunday night based on the kind of developments we see in Ukraine.

  • NEW YORK, Feb 28- U.S. oil on Friday had its eighth straight week of gains on market talk of fewer oil rail shipments from the booming Bakken shale in North Dakota. Brent oil settled moderately higher but ended the week lower, weighed down by an outlook for dampening demand in China and another for stymied European growth due to uprisings in Ukraine.

  • Russia likely to get what Russia wants in showdown Friday, 28 Feb 2014 | 5:21 PM ET
    Russian sailors do their morning exercises near a navy vessel in the bay of the Ukrainian city of Sevastopol, the main base of the Russian Black Sea Fleet, in September 2011.

    If Crimea tries to secede from Ukraine with Russian support, there's almost nothing Ukraine could do to stop it.

  • Ukraine a sell signal: Trader     Friday, 28 Feb 2014 | 5:15 PM ET

    The "Fast Money" crew trades on uncertainty in Ukraine. And Retired US Army Gen. Wesley Clark assess the military situation there.

  • President Obama says any violation of Ukraine's sovereignty from Russia would be deeply destabilizing to Ukraine and not in the best interest of Europe.

  • NEW YORK, Feb 28- The S&P 500 ended at another record close on Friday but well off the day's highs as worries about tensions in Ukraine caused investors to take profits ahead of the weekend.

  • Pres. Obama to speak on Ukraine     Friday, 28 Feb 2014 | 4:42 PM ET

    CNBC's Eamon Javers previews President Obama's statement on tensions in Ukraine set to take place late Friday afternoon. Willis Sparks, Eurasia Group, provides insight.

  • President Obama is set to speak on tensions in Ukraine late Friday afternoon. Meet the Press moderator David Gregory provides insight into what the president may say.

  • NEW YORK, Feb 28- The S&P 500 and Dow briefly turned lower in late trading on Friday as worries about tensions in Ukraine caused investors to take profits ahead of the weekend. Ukraine's acting president accused Russia of open aggression and said Moscow was following a similar scenario to the one before it went to war with Georgia in 2008..

  • *Mounting tensions in Ukraine keep risk appetite in check. NEW YORK, Feb 28- U.S. oil rose on Friday on market talk of decreased supply from the Bakken shale in North Dakota. Tension in Ukraine and lower estimates for U.S. gross domestic product capped gains.

  • No official police presence in Kiev     Friday, 28 Feb 2014 | 1:27 PM ET

    CNBC's Michelle Caruso-Cabrera reports Secretary of State John Kerry told Russia it's important not to inflame the situation in Ukraine's Crimea region. Ad hoc military has taken control of the country.

  • RIO DE JANEIRO/ LONDON, Feb 28- Ukraine's hryvnia jumped as much as 10 percent on Friday on hopes of a loan from the International Monetary Fund, while the Brazilian real slid 0.5 percent after the latest budget data poured cold water on hopes that the country would halt a deterioration in its fiscal performance.

  • NEW YORK, Feb 28- The dollar fell to a two-month low against the euro on Friday after data showed euro zone inflation unexpectedly held steady this month and U.S. economic growth was revised lower for the fourth quarter.