New York Stock Exchange|David Blaikie|CC BY 2.0

The DOW fell 622 points (1.8 %) to a new yearly low on Thursday—making it the worst day of the year for the index—amidst growing worries of a Russian invasion of Ukraine. Investors are speculative about the potential impact on oil prices and the global economy in the event of a military engagement between Russia and Ukraine, particularly if the U.S. and key European nations are to get involved.