European stocks closed mixed on Tuesday as as the crisis in Ukraine curbed enthusiasm for riskier assets.
CNBC's Rick Santelli and Yra Harris, Praxis Trading partner, discuss how Vladimir Putin influences the global markets and the German economy.
The Russian president's hold on the Crimean peninsula in Ukraine could pose a serious energy risk to Europe, oilman T. Boone Pickens says.
Ousted leader Viktor Yanukovich insists that he remains Ukraine's legitimate president and commander-in-chief.
T. Boone Pickens, BP Capital founder, discusses how natural gas inventories are likely to impact the price of natural gas.
T. Boone Pickens, BP Capital founder, shares his plans to use natural gas to fuel vehicles. It would be a "nightmare" to have the government build the infrastructure, says Boone.
T. Boone Pickens, BP Capital founder, talks about the nation's energy boom and sounds off on Russia's attempt to profit from Ukraine's natural resources.
NBC's Jim Maceda reports Ukraine launches its national guard ahead, as Yanukovych declares he remains Ukraine's president and commander-in-chief.
CNBC's Jim Maceda reports ousted Ukrainian President Viktor Yanukovych insists he is still the legitimate leader of the Ukraine.
Why LNG exports make sense, and why the government needs to speed up approvals, with Michael S. Smith, Freeport LNG Chairman & CEO, and Daniel Yergin, IHS Vice Chairman.
Alastair Newton, Senior Political Analyst at Nomura, explains why he thinks Ukraine and its Western allies have lost hold of Crimea, as the latter prepares for a referendum to join Russia on Sunday.
When it comes to the conflict over Crimea, Ukraine has few if any military options.
Art Cashin of UBS Financial Services discusses why the U.S. stock market was under pressure Monday.
CNBC's Michelle Caruso-Cabrera reports that despite intense diplomatic discussions, Russia continues to infiltrate Crimea. Peter Felstead, Jane's Defence, breaks down the size differential and defense budgets of the Russian and Ukrainian militaries.
U.K. prime minister, David Cameron, says should it go forward, the Crimean referendum would be viewed as illegal and that there would be consequences for Russia if it continued to intervene.
Protests continued over the weekend in Crimea and Ukraine, reports NBC's Jim Maceda, even as Russia appears to step even further onto Ukraine's doorstep.
Boris Schlossberg, BK Asset Management, explains why he thinks the Russian ruble will get weaker. And Carl Larry, explains why oil prices could continue to rise.
CNBC's Michelle Caruso-Cabrera reports tensions remain high between Russia and Ukraine, and Germany's Merkel remarks the Crimea referendum is illegal.
International monitors were prevented from entering Crimea over the weekend, NBC's Jim Maceda reports, adding that some reports state that fresh minefields have been placed between Crimea and the rest of Ukraine.
CNBC's Jim Maceda reports tensions remain high between Russia and Ukraine as the conflict between the two countries intensifies. Right now it's about money, energy and Putin, says Maceda.