What a crazy day it was for the Dow Jones Industrial Average (INDEX: ^DJI), which crawled nearly all the way back to even today after dropping more than 190 points in early trading. Europe was the main catalyst for the drop early in the day, as investors continued to worry about the possibility of Greece's exit from the eurozone. But the day turned around late as optimism reigned that the Greece fears were overblown, and more positive U.S. housing data was digested. Individually, Bank of America (NYSE: BAC) was the biggest winner on the day, while Intel (NYSE: INTC) and Microsoft were dragged down by Dell's poor earnings and concern about demand for PCs. Outside the Dow, Facebook (Nasdaq: FB) finally had a positive day, gaining 3.2%, but is still down 23.9% since its IPO on Friday. 

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Brendan Byrnes owns no shares of any company mentioned above. The Motley Fool owns shares of Intel, Bank of America, and Microsoft. Motley Fool newsletter services have recommended buying shares of Intel, Dell, and Microsoft, creating a diagonal call position in Wal-Mart Stores, and creating a bull call spread position in Microsoft. The Motley Fool has a disclosure policy. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. Try any of our Foolish newsletter services free for 30 days.