The Ukrainian government is legitimate and Russia "needs to cope with this", Arseniy Yatsenyuk, Ukraine's prime minister told CNBC, urging Putin to "immediately pull back" Russian troops.
The Ukrainian economy has collapsed says Pavlo Sheremeta, Ukraine's economy minister, adding that the country now needs to quickly design and implement an austerity program.
Russia is now firmly in control of Crimea, reports NBC's Jim Maceda, with the latest developments in the region.
CNBC's Michelle Caruso-Cabrera reports global stocks are lower but not nearly as low as Russian stocks which are showing signs of capital flight after Putin's threats to invade Ukraine.
The rhetoric is heating up as Russian forces move into Crimea, reports CNBC's Steve Sedgwick on the latest details from the escalating conflict between Ukraine and Russia.
Ben Moores, senior analyst commercial aircraft markets at IHS, discusses the global defense industry and whether the events in Ukraine will impact the sector.
Kiev's Independence Square continues to bear traces of the bloodshed and violence of the Ukrainian protest reports CNBC's Steve Sedgwick from Kiev.
Daragh McDowell, senior analyst at Maplecroft, says Russia is trying to provoke a "Georgian-style scenario" by forcing Ukraine to fire the first shot and says a Western-led military action against Russia is unlikely.
Putin is trying to pressure Ukraine into a certain economic agenda says Volodymyr Ariev, independent minister in the Ukrainian Parliament, adding that the country's army has been significantly weakened.
John Wraith, fixed income strategist at Bank of America Merril Lynch, says core sovereign markets remain "appealing" when it comes to fixed income and adds the Fed could put tapering on hold if the situation in Ukraine worsens.
NATO and the U.K. have called on Russia to "de-escalate tensions", as the Ukrainian acting foreign minister, Andriy Deshchitsya, says Russia has rejected calls for negotiations and consultations.
Russia's intrusion in Ukraine is a declaration of war says Victoria Sumar, Deputy Secretary of the Council of National Security and Defence of Ukraine, adding that Ukraine has "no reason to use armed forces right now."
Jane Foley, senior currency strategist at Rabobank, discusses the foreign exchange market and says that that the euro zone and its currency have "safe-haven characteristics."
The European Union has little "beyond the diplomacy card" to punish Russia, reports CNBC's Carolin Roth from Brussels as economic sanctions could have big repercussions for the region's economy.
Russia's energy minister canceled his appearance before a global energy conference, where the Russian invasion of Crimea is now a part of the agenda.
Jonathan Pain, Author of 'The Pain Report', says 'the unimaginable have become imaginable' in Ukraine and markets are now beginning to 'price in a possible contagion'.
Bruno Del Ama, CEO of Global X Funds, analyzes Monday's risk-off sentiment prevalent in Asian markets amid brewing instability in Ukraine, and discusses how investors can single out investment opportunities.
Chong Yoon-chou, Investment Director at Aberdeen Asset Management, says conflicts like the ongoing crisis in Ukraine, usually presents some investment opportunities.
U.S. Secretary of State John Kerry's statement to Russia was 'good and sober', says John Herbst, Director of the Center for Complex Operations at the National Defense University.
While the crisis in Ukraine may not have implications for financial markets, James Gruber, Author of investment newsletter "Asia Confidential", says it adds 'another layer of risk that may trigger a broader correction'.