Stocks are plunging around the world as fears spread that Europe's attempt to contain Greece's debt crisis will fail.
The dollar is spiking against the embattled euro Tuesday, sending prices for oil and other commodities sharply lower.
Stocks have seesawed in the past week as Europe's efforts to agree on a bailout package for Greece proceeded in fits and starts. People are taking to the streets in Greece to protest the latest round of sweeping budget cuts, and investors worry that larger European countries like Spain or Portugal could also need emergency loans.
At midday, the Dow Jones industrial average is down 220 at 10,931. The Standard & Poor's 500 index is down 27 at 1,176. The Nasdaq composite index is down 73 at 2,425.