Insight to the volatile moves in the market Tuesday, with CNBC's Bob Pisani.
The market's wild swings come as investors ponder oil's role in Fed rate decisions.
Apple stopped product sales in the troubled country Tuesday "due to extreme fluctuations in the value of the ruble."
Central bankers in developed countries have been slashing rates to spur growth, but rates have soared in the world's weakest economies.
The strength of the U.S. economy should outweigh weakness abroad as the Fed considers interest rates, Deutsche Bank's Joseph LaVorgna said.
Apple said due to extreme fluctuations in the value of the Russian ruble, it has halted online sales in Russia, reports CNBC's Josh Lipton.
It's clear the US is not prepared for the extent of damage that Vladimir Putin can unleash, says Jake Novak.
New York Times Moscow correspondent Andrew Kramer, discusses Vladimir Putin's next move amid today's volatile ruble trade.
The Russian Central Bank raising its key interest rate will only make the economy worse and Russia will go "bust" says Howard Shore, founder & executive chairman at Shore Capital.
Walter Isaacson, president & CEO of The Aspen Institute, discusses what the collapse of oil prices is doing to Russia and how it threatens Vladimir Putin's leadership.
CNBC's Robert Frank discusses how the crisis on Russian markets is putting the squeeze on billionaire Russian oligarchs and could cause dramatic wealth destruction.
Discussing oil price volatility and where oil will settle, with Francisco Blanch, BofA Merrill Lynch Global Research.
As the Russian ruble falls to all-time lows, CNBC's Michelle Caruso-Cabrera, reports Russian PM Dmitry Medvedev had an emergency meeting with head of Russian central banks and finance minister.
Michelle Caruso-Cabrera reports on what's likely pushing the Russian currency lower after Russia raised rates to 17 percent overnight as oil continues its decline.
Boris Jordan, Sputnik Fund president & CEO, shares his thoughts on what's driving Russia's currency lower and the lack of confidence in its monetary policy.
Russia's ruble plunged to an all-time low against the U.S. dollar on Tuesday, despite the Russian central bank's move to hike rates to 17 percent.
Michelle Caruso-Cabrera reports on Russia's central bank's efforts to stop the slide of the ruble by issuing an emergency rate hike to 17 percent.
Mark Grant, Southwest Securities discusses the massive interest rate hike in Russia and its likely impact on the ruble.
Boris Schlossberg, BK Asset Management, discusses the collapse of Russia's ruble.
Michelle Caruso-Cabrera, takes a look at Russia's huge emergency rate hike as the ruble continues to decline.